At January 1, 2017, the credit balance of Grouper Corp.'s Allowance for Doubtful Accounts was $404,000. During 2017, the bad debt expense entry was based on a percentage of net credit sales. Net sales for 2017 were $79 million, of which 90% were on account. Based on the information available at the time, the 2017 bad debt expense was estimated to be 0.80% of net credit sales. During 2017, uncollectible receivables amounting to $488,000 were written off against the allowance for doubtful accounts. The company has estimated that at December 31, 2017, based on a review of the aged accounts receivable, the allowance for doubtful accounts would be properly measured at $523,000 (al) Calculate the bad debt expense accrual Bad debt expense accrual