diff --git a/Gemfile b/Gemfile
index 48f67f96f..9f888c822 100644
--- a/Gemfile
+++ b/Gemfile
@@ -37,6 +37,8 @@ gem 'cloudinary'
 
 # for internationalizing
 gem 'rails-i18n'
+# Windows: timezone data (required on Windows for tzinfo)
+gem 'tzinfo-data', platforms: %i[ windows jruby ]
 
 # as authentification framework
 gem 'devise'
diff --git a/Gemfile.lock b/Gemfile.lock
index e8e00fba4..834cb45fa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -254,8 +254,7 @@ GEM
       faraday (~> 2.0)
     fastimage (2.3.0)
     feature (1.4.0)
-    ffi (1.17.0-arm64-darwin)
-    ffi (1.17.0-x86_64-darwin)
+    ffi (1.17.0-x64-mingw-ucrt)
     ffi (1.17.0-x86_64-linux-gnu)
     font-awesome-sass (6.5.1)
       sassc (~> 2.0)
@@ -384,9 +383,7 @@ GEM
     next_rails (1.3.0)
       colorize (>= 0.8.1)
     nio4r (2.7.0)
-    nokogiri (1.16.6-arm64-darwin)
-      racc (~> 1.4)
-    nokogiri (1.16.6-x86_64-darwin)
+    nokogiri (1.16.6-x64-mingw-ucrt)
       racc (~> 1.4)
     nokogiri (1.16.6-x86_64-linux)
       racc (~> 1.4)
@@ -644,8 +641,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    sqlite3 (1.7.2-arm64-darwin)
-    sqlite3 (1.7.2-x86_64-darwin)
+    sqlite3 (1.7.2-x64-mingw-ucrt)
     sqlite3 (1.7.2-x86_64-linux)
     ssrf_filter (1.1.2)
     stripe (5.55.0)
@@ -672,6 +668,8 @@ GEM
     turbolinks-source (5.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    tzinfo-data (1.2025.3)
+      tzinfo (>= 1.0.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (2.5.0)
@@ -707,11 +705,7 @@ GEM
     zeitwerk (2.6.13)
 
 PLATFORMS
-  arm64-darwin-20
-  arm64-darwin-23
-  arm64-darwin-24
-  x86_64-darwin-21
-  x86_64-darwin-23
+  x64-mingw-ucrt
   x86_64-linux
 
 DEPENDENCIES
@@ -824,6 +818,7 @@ DEPENDENCIES
   timecop
   transitions
   turbolinks
+  tzinfo-data
   uglifier (>= 1.3.0)
   unobtrusive_flash (>= 3)
   web-console
@@ -832,7 +827,7 @@ DEPENDENCIES
   whenever
 
 RUBY VERSION
-   ruby 3.3.8p144
+   ruby 3.3.10p183
 
 BUNDLED WITH
    2.5.6
diff --git a/README.md b/README.md
index 035fd8cdc..11fe57e41 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# [Snap!Con](https://snapcon.org) Base Repository
+## [Snap!Con](https://snapcon.org) Production Repository
 [![Specs](https://github.com/snap-cloud/snapcon/actions/workflows/spec.yml/badge.svg)](https://github.com/snap-cloud/snapcon/actions/workflows/spec.yml)
 [![Maintainability](https://qlty.sh/gh/snap-cloud/projects/snapcon/maintainability.svg)](https://qlty.sh/gh/snap-cloud/projects/snapcon)
 [![Code Coverage](https://qlty.sh/gh/snap-cloud/projects/snapcon/coverage.svg)](https://qlty.sh/gh/snap-cloud/projects/snapcon)
diff --git a/app/assets/stylesheets/application.css b/app/assets/stylesheets/application.css
index 31a1fdae0..e39b04261 100644
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@@ -24,5 +24,5 @@
  *= require selectize.bootstrap3
  *= require conferences
 
- *= require fullcalendar-scheduler/main.css
+  *= require fullcalendar-scheduler/main.css
 */
diff --git a/app/controllers/admin/physical_tickets_controller.rb b/app/controllers/admin/physical_tickets_controller.rb
index 6c0414c65..e98b8a4a7 100644
--- a/app/controllers/admin/physical_tickets_controller.rb
+++ b/app/controllers/admin/physical_tickets_controller.rb
@@ -11,6 +11,7 @@ def index
       @physical_tickets = @conference.physical_tickets
       @tickets_sold_distribution = @conference.tickets_sold_distribution
       @tickets_turnover_distribution = @conference.tickets_turnover_distribution
+      @ticket_sales_by_currency_distribution = @conference.ticket_sales_by_currency_distribution
     end
   end
 end
diff --git a/app/models/conference.rb b/app/models/conference.rb
index 20e1ce441..585420049 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -564,6 +564,42 @@ def tickets_turnover_distribution
     result
   end
 
+  ##
+  # Gross ticket sales per enabled currency (no refunds/fees).
+  # Returns a hash suitable for donut chart: { "USD" => { value:, color: }, ... }
+  # Only includes currencies that are enabled for the conference (base + conversions).
+  def ticket_sales_by_currency_distribution
+    result = {}
+    enabled_currencies = enabled_currencies_list
+    return result if enabled_currencies.blank?
+
+    # Gross sales: sum(amount_paid_cents * quantity) per currency, paid only
+    sums = ticket_purchases.paid.group(:currency).sum('amount_paid_cents * quantity')
+    enabled_currencies.each do |currency|
+      total_cents = sums[currency].to_i
+      next if total_cents.zero?
+
+      amount = Money.new(total_cents, currency)
+      label = "#{currency} (#{ApplicationController.helpers.humanized_money(amount)})"
+      # Use amount in major units (e.g. 50 for $50) so chart tooltip shows readable numbers, not cents
+      result[label] = {
+        'value' => (total_cents / 100.0).round(2),
+        'color' => "\##{Digest::MD5.hexdigest(currency)[0..5]}"
+      }
+    end
+    result
+  end
+
+  ##
+  # List of currencies enabled for this conference (base + conversion targets).
+  def enabled_currencies_list
+    base = tickets.first&.price_currency
+    return [] if base.blank?
+
+    targets = currency_conversions.pluck(:to_currency).uniq
+    [base] | targets
+  end
+
   ##
   # Calculates the overall program minutes
   #
diff --git a/app/views/admin/physical_tickets/index.html.haml b/app/views/admin/physical_tickets/index.html.haml
index 96722dc98..96e2957f2 100644
--- a/app/views/admin/physical_tickets/index.html.haml
+++ b/app/views/admin/physical_tickets/index.html.haml
@@ -12,6 +12,9 @@
     .col-md-4
       = render 'donut_chart', title: 'Tickets turnover',
         combined_data: @tickets_turnover_distribution
+    .col-md-4
+      = render 'donut_chart', title: 'Gross ticket sales by currency',
+        combined_data: @ticket_sales_by_currency_distribution
   %br
   - if @physical_tickets.any?
     .row
diff --git a/config/puma.rb b/config/puma.rb
index c401d6fc2..69424aac8 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -24,15 +24,16 @@
 # Workers do not work on JRuby or Windows (both of which do not support
 # processes).
 #
-workers ENV.fetch('WEB_CONCURRENCY') { 2 }
+worker_count = ENV.fetch('WEB_CONCURRENCY') { Gem.win_platform? ? 0 : 2 }.to_i
+workers worker_count
 # Set a 10 minute timeout in development for debugging.
-worker_timeout 60 * 60 * 10 if ENV.fetch('RAILS_ENV') == 'development'
+worker_timeout 60 * 60 * 10 if ENV.fetch('RAILS_ENV') == 'development' && worker_count > 0
 
 # Use the `preload_app!` method when specifying a `workers` number.
 # This directive tells Puma to first boot the application and load code
 # before forking the application. This takes advantage of Copy On Write
 # process behavior so workers use less memory.
-preload_app!
+preload_app! if worker_count > 0
 
 lowlevel_error_handler do |ex, env|
   Sentry.capture_exception(
diff --git a/info.yml b/info.yml
new file mode 100644
index 000000000..494e6be19
--- /dev/null
+++ b/info.yml
@@ -0,0 +1,27 @@
+project:
+  name: 'snapcon' # Your project name, e.g. Cue-to-cue
+  owner: 'CS169L-26' # Do not change
+  teamId: '04' # Your team number, e.g. 02
+  identities:
+    heroku: 'https://sp26-04-snapcon.herokuapp.com' # Your Heroku app URL
+  members:
+    member1: # Add all project members
+      name: 'Ethan' # Member 1 name
+      surname: 'Stone' # Member 1 last name
+      githubUsername: 'Ethan-Stone1' # Member 1 GitHub username
+      herokuEmail: 'ethanstone@berkeley.edu' # Member 1 Heroku username
+    member2:
+      name: 'Benjamin'
+      surname: 'Sikes'
+      githubUsername: 'sikesbc'
+      herokuEmail: 'bcsikes@berkeley.edu'
+    member3:
+      name: 'Yijun'
+      surname: 'Zhou'
+      githubUsername: 'zhouyijun111'
+      herokuEmail: 'zhouyijun@berkeley.edu'
+    member4:
+      name: 'Xinwei'
+      surname: 'Li'
+      githubUsername: 'li-xinwei'
+      herokuEmail: 'xinweili@berkeley.edu'
\ No newline at end of file
diff --git a/lib/tasks/demo_ticket_sales.rake b/lib/tasks/demo_ticket_sales.rake
new file mode 100644
index 000000000..eb01a145f
--- /dev/null
+++ b/lib/tasks/demo_ticket_sales.rake
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+namespace :data do
+  desc 'Add demo paid ticket sales (USD + EUR) for testing "Gross ticket sales by currency" chart. Usage: CONF=123123 rake data:demo_ticket_sales'
+  task demo_ticket_sales: :environment do
+    short_title = ENV['CONF'] || Conference.first&.short_title
+    conference = Conference.find_by(short_title: short_title)
+    unless conference
+      puts "Conference not found. Set CONF=short_title (e.g. CONF=123123) or create a conference first."
+      next
+    end
+
+    base_currency = conference.tickets.first&.price_currency || 'USD'
+    # Ensure we have a non-free ticket for paid sales
+    paid_ticket = conference.tickets.find_by(registration_ticket: false).presence || conference.tickets.first
+    unless paid_ticket
+      puts "No ticket found for conference #{short_title}."
+      next
+    end
+
+    # If ticket is free, create a paid "Supporter" ticket
+    if paid_ticket.price_cents.zero?
+      paid_ticket = conference.tickets.create!(
+        title: 'Supporter',
+        price_cents: 2_000,
+        price_currency: base_currency,
+        description: 'Demo paid ticket',
+        registration_ticket: false,
+        visible: true
+      )
+      puts "Created paid ticket: #{paid_ticket.title} (#{Money.new(paid_ticket.price_cents, base_currency).format})"
+    end
+
+    # Add EUR conversion so "enabled currencies" includes EUR
+    if base_currency == 'USD' && conference.currency_conversions.find_by(from_currency: 'USD', to_currency: 'EUR').blank?
+      conference.currency_conversions.create!(from_currency: 'USD', to_currency: 'EUR', rate: 0.92)
+      puts 'Added USD -> EUR conversion (rate 0.92).'
+    end
+
+    user1 = User.first || User.create!(email: 'demo1@example.com', name: 'Demo User 1', password: 'password123456', confirmed_at: Time.current)
+    user2 = User.second || User.create!(email: 'demo2@example.com', name: 'Demo User 2', password: 'password123456', confirmed_at: Time.current)
+
+    # Payment + purchase in USD
+    payment_usd = Payment.create!(conference: conference, user: user1, currency: 'USD', status: :success, amount: 5_000)
+    purchase_usd = TicketPurchase.new(
+      conference: conference, user: user1, ticket: paid_ticket,
+      quantity: 2, currency: 'USD', amount_paid_cents: 2_500, amount_paid: 25.0
+    )
+    purchase_usd.payment = payment_usd
+    purchase_usd.save!(validate: false)
+    purchase_usd.update_columns(paid: true)
+    purchase_usd.quantity.times { purchase_usd.physical_tickets.create! }
+    puts "Created USD purchase: 2 x #{paid_ticket.title} = $50 (5000 cents)."
+
+    # Payment + purchase in EUR (if base is USD and we have conversion)
+    if conference.currency_conversions.exists?(to_currency: 'EUR')
+      payment_eur = Payment.create!(conference: conference, user: user2, currency: 'EUR', status: :success, amount: 4_600)
+      purchase_eur = TicketPurchase.new(
+        conference: conference, user: user2, ticket: paid_ticket,
+        quantity: 1, currency: 'EUR', amount_paid_cents: 4_600, amount_paid: 46.0
+      )
+      purchase_eur.payment = payment_eur
+      purchase_eur.save!(validate: false)
+      purchase_eur.update_columns(paid: true)
+      purchase_eur.physical_tickets.create!
+      puts "Created EUR purchase: 1 x #{paid_ticket.title} = 46 EUR (4600 cents)."
+    end
+
+    puts "Done. Refresh the Ticket Purchases page to see the 'Gross ticket sales by currency' chart."
+  end
+end