app/helpers/admin/redeem_requests_helper.rb
module Admin::RedeemRequestsHelper
def amount_for_store(store = nil)
redeem_requests = RedeemRequest.where(status: false)
redeem_requests = redeem_requests.where(store: store) if store and REDEEM['amazon_stores'].include?(store)
redeem_requests.sum(:amount)
end
end