I want to add two details to sales summary report on point of sale: start invoice number, and end invoice number.

When you are in Point Of Sale - Orders, you have a list of all your sales, and when you check the box of some items you can select the option of print a sales (summary), then the report shows details of those sales, like start period and end period. I want to add to this report two more details: start invoice number and end invoice number. Showing the minor number of the invoices selected, and the major number of invoices selected.