A buyer of $7,200 in merchandise inventory failed to take advantage of the vendor's credit terms of 2/15,n/45, and instead paid the invoice in full at the end of 45 days. By not taking advantage of the cash discount, the buyer lost the discount of: A. $720.00 B. $100.00 C. $72.00 D. $144.00 E. $1,080.00