made winson changes

app/models/items/recurring_donation.rb

@@ -9,31 +9,14 @@ def description_for_audit_txn ; end
   def monthly_amount
     # Finds the first donation with the recurring_donation_id matching this instance's id
     donation = Donation.find_by(recurring_donation_id: id)
-    donation ? donation.amount : 0  # Returns the donation amount if found, otherwise returns 0
+    donation ? donation.amount : nil  # Returns the donation amount if found, otherwise returns nil
   end
-  def first_donation
-    # Retrieves the earliest donation based on the created_at timestamp
-    Donation.where(recurring_donation_id: id).order(sold_on: :asc).first
-  end
-  def latest_donation
-    # Retrieves the most recent donation based on the created_at timestamp
-    Donation.where(recurring_donation_id: id).order(sold_on: :desc).first
-  end  
   def total_to_date
-    date1 = first_donation.sold_on.to_date
-    date2 = latest_donation.sold_on.to_date
-
-    # Calculate the absolute difference in months
-    difference_in_months = (date2.year * 12 + date2.month) - (date1.year * 12 + date1.month)
-
-    # The abs method ensures the difference is always a positive number
-    # The +1 includes the first month
-    months_paid = difference_in_months.abs + 1
-    months_paid * monthly_amount
+    RecurringDonation.find(id).donations.sum(:amount)
   end
   def item_description
     # Finds the first donation with the recurring_donation_id matching this instance's id
     donation = Donation.find_by(recurring_donation_id: id)
-    donation ? donation.item_description : "" # Returns the donation item description if found, otherwise returns ""
+    donation ? donation.item_description : nil # Returns the donation item description if found, otherwise returns nil
   end
 end