there is a typo, the 5% in item c. is a third trade discount

Lasky Company sold merchandise with a list price of $72,000 on July 1. For each of the following independent assumptions, calculate (1) the gross selling price used to record the sale and (2) the amount that the buyer would have to remit when paying the invoice. Trade Discount Granted a. 30%, 20% b. 40%, 10% c. 30%, 10%, d. 40% Credit Terms 2/10,n/30 2/EOM, 1/60 5% 3/10/EOM, 1/60 1/10, n/30 Date Paid July 10 August 10 August 10 July 12