feat: cherry pick interruption_screen_helper update from cdae8964c6

app/helpers/interruption_screen_helper.rb

@@ -7,6 +7,8 @@ module InterruptionScreenHelper
       value = if argument["label"]
                 pre_casing_value = lettings_log.form.get_question(argument["key"], lettings_log).answer_label(lettings_log)
                 pre_casing_value.downcase
+              elsif argument["currency"]
+                ["£", ActionController::Base.helpers.number_to_currency(lettings_log.public_send(argument["key"]), delimiter: ",", format: "%n")].join("")
               else
                 lettings_log.public_send(argument["key"])
               end
@@ -30,6 +32,8 @@ module InterruptionScreenHelper
     arguments.each do |argument|
       value = if argument["label"]
                 lettings_log.form.get_question(argument["key"], lettings_log).answer_label(lettings_log).downcase
+              elsif argument["currency"]
+                ["£", ActionController::Base.helpers.number_to_currency(lettings_log.public_send(argument["key"]), delimiter: ",", format: "%n")].join("")
               else
                 lettings_log.public_send(argument["key"])
               end