Sal and jen went to the store together, and each bought the same car stereo. sal used a card to make the purchase, and the full amount was immediately withdrawn from his bank account. jen used a card to make the purchase, and she received a bill within 15 days of the purchase. she paid $21.30 for the next 18 months until the bill was paid in full. the full payment included $58.60 in interest. which statement describes sal's purchase? a. sal used a debit card and paid a total of $383.40 for the stereo. b. sal used a debit card and paid a total of $324.80 for the stereo. c. sal used a credit card and paid a total of $383.40 for the stereo. d. sal used a credit card and paid a total of $324.80 for the stereo.