To insert a subtotal on a purchase
If you haven't already read the Purchases Overview, see Entering line items for more information.
The Purchases window should be displayed.
If the line on which you want to insert the subtotal is empty -- no transaction is entered on the line, and it's not a blank, header or subtotal line -- click in the line. (The subtotal will be inserted here.)
Click on a line where there is a transaction, blank, header, or subtotal line entered on the line. (The subtotal will appear above the line.)
To insert a subtotal