Sal used a card to make the purchase, and the full amount was immediately withdrawn from his bank account.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?
Sal used a debit card and paid a total of $383.40 for the stereo.
Sal used a debit card and paid a total of $324.80 for the stereo.
Sal used a credit card and paid a total of $383.40 for the stereo.
Sal used a credit card and paid a total of $324.80 for the stereo.