Each line shows the INVOICE NO., the CUSTOMER NAME, CONTACT NUMBER and EMAIL ADDRESS, the INVOICE DATE, the PACKAGE DISCOUNT (the discount or coupon applied to the invoice), the REWARD DISCOUNT (the rewards program amount redeemed on it), the GROUP DISCOUNT (the group or fleet customer's discount on parts and labor together), the TOTAL DISCOUNT, which is the three added, and the INVOICE TOTAL, the gross amount of the invoice. Every invoice with any discount is listed, drafts as well as finalized invoices, but not voided or deleted ones. The foot row sums the five money columns for the lines on the page.
The Add To Favorites switch beside the heading saves the report under Favorites on the Reports page. Which reports you see depends on your admin group permissions.