I suggest that a report on sales summary that includes both cash sales and sales invoices should be included under sales reports. Currently the sales invoice totals reports is very useful but it captures only sales recorded through sales invoice but not through Receipts and payments.
I have subscribed to manager for a pharmacy that sells only for cash and they need their daily sales report per item showing total quantities sold per day for each item and their value.
To have this report in manager one has to record all sales through invoice before recording a receipt against them. This is time consuming for a retail business.
The report will also help to attract grocery stores and super markets who sell mainly by cash