What was the cash amount Randy Retailer received from Customer B on 4/17?

417 Randy Retailer, sold on account to Customer B, merchandises valued at $10,000. Credit Terms 2/10, n/30. The mechandises had originally cost Randy Retailer $6,500. 4/10 Customer B returned merchandises valued at $2,000. Those merchandises had originally cost Randy Retailer $800. 4/17 Customer B settled the account with Randy Retailer. What was the cash amount Randy Retailer received from Customer B on 4/17? a. $8,000 b. $5,760 c. $7,840 d. $6,930