McMahon Company on July 15 sells merchandise on account to Swift Co. for $3,000, terms 2/10, n/30. On July 20, Swift Co. returns merchandise worth $1,200 to McMahon Company. On July 24, payment is received from Swift Co. for the balance due. What is the amount of cash received? A $1,800 B $1,764 C $1,740 D $3,000