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 do I update or change my business' details? How does MyDeal Payment System work? The transaction fee does not match with the number of orders included in the invoice. How often do I get paid? Where do I find invoices for each payment?