4/7 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? O a $8,000 O b.$5,760 O c. $7,840 O d. $6,930