On February 2, Fast Wholesales Inc. sells merchandise on account for $7,500 to Quick Retail LLC with credit terms of 2/10, n/30. On February 8, Quick Retail LLC returns $1,500 worth of the merchandise that was damaged during shipment, along with a payment to settle the account. How much did Quick Retail LLC pay Fast Wholesales Inc. for the remaining account balance? a) $7,350 b) $7,380 c) $6,000 d) $5,880