add number currency format

lib/number_utils.rb

@@ -4,7 +4,16 @@ module NumberUtils
   FORMAT_LOCALES = {
     'dot' => 'de',
     'space' => 'fr',
-    'comma' => 'en'
+    'comma' => 'en',
+    'usd' => 'en',
+    'eur' => 'fr',
+    'gbp' => 'en'
+  }.freeze
+
+  CURRENCY_SYMBOLS = {
+    'usd' => '$',
+    'eur' => '€',
+    'gbp' => '£'
   }.freeze
 
   module_function
@@ -12,7 +21,9 @@ module NumberUtils
   def format_number(number, format)
     locale = FORMAT_LOCALES[format]
 
-    if locale
+    if CURRENCY_SYMBOLS[format]
+      ApplicationController.helpers.number_to_currency(number, locale:, precision: 2, unit: CURRENCY_SYMBOLS[format])
+    elsif locale
       ApplicationController.helpers.number_with_delimiter(number, locale:)
     else
       number