At the end of the first year of operations, Mayberry Advertising had accounts receivable of $20,500. Management of the company estimates that 10% of the accounts will not be collected. Determine the financial statement effects of the adjusting entry to allow for uncollectible accounts. (Amounts to be deducted should be entered with minus sign.) At the end of the first year of operations, Mayberry Advertising had accounts receivable of $20,500. Management of the company estimates that 10% of the accounts will not be collected. Determine the financial statement effects of the adjusting entry to allow for uncollectible accounts. (Amounts to be deducted should be entered with minus sign.)