At the beginning of the current period, Isenbath Corp. had balances in Accounts Receivable of $210,000 and in Allowance for Doubtful Accounts of $9,000 (credit). During the period, it had net credit sales of $780,000 and collections of $743,000. It wrote off as uncollectible accounts receivable of $6,800. However, a $2,000 account previously written off as uncollectible was recovered before the end of the current period. Uncollectible accounts are estimated to total $22,400 at the end