Move currency helper to existing subscriptions helpers file

app/helpers/subscriptions_helper.rb

@@ -1,5 +0,0 @@
-module SubscriptionsHelper
-  def currency(amount)
-    number_to_currency(amount, precision: (amount % 1).zero? ? 0 : 2)
-  end
-end

saas/app/helpers/subscriptions_helper.rb

@@ -12,4 +12,8 @@ module SubscriptionsHelper
       "Your next payment is <b>#{ currency(subscription.next_amount_due) }</b> on".html_safe
     end
   end
+
+  def currency(amount)
+    number_to_currency(amount, precision: (amount % 1).zero? ? 0 : 2)
+  end
 end