7. Before actual write-offs, Regan Companys Accounts receivable account had a normal balance of $82,000, and its Allowance for Doubtful Accounts had a normal balance of $1,140. The company wrote of $980 of delinquent accounts. Management estimated that 3% of its net sales of $106,000 would not be collected. What is the net realizable value of accounts receivable reported on the companys balance sheet at the end of the year? A. $78,660 B. $77,840 C. $77,680 D. $78,820

the answer is C, why? I want the process, thank you!