How is "Monthly Sales" on the Home tab calculated? December 10, 2018 04:20 Updated Your monthly sales are calculated based on your sales for the last 30 days from the date of view. Related articles How does MyDeal Payment System work? The transaction fee does not match with the number of orders included in the invoice. Where do I find invoices for each payment? How will the new GST rule effect my payments? What are the stars under my display name?