If you will pay within 12 days, you will be able to avail of the discount given by Acme based on the bill given to you. The mark “3 x 12 net 30” means that you will have 3% if you can pay within 12 days and maturity of the bill will be within 30 days. Since the amount of bill is $98.65, you need to compute the amount of discount by multiplying the discount rate to the face amount of bill ($98.65 x 3% = $2.96). To compute for the amount to be tendered, you have to deduct the discount to the face amount ($98.65 - $2.96 = $95.69).