At December 31, Gill Co. reported accounts receivable of $238,000 and an allowance for uncollectible accounts of $600 (credit) before any adjustments. An analysis of accounts receivable suggests that the allowance for uncollectible accounts should be 3% of accounts receivable. The amount of the adjustment for uncollectible accounts would be: A. $6,540. B. $7,800. C. $7,140. D. $7,740.