from Effect of Doubtful Accounts on Net Income During its first year of operations, Mack's Plumbing Supply Co. had sales of $340,000, wrote off $5,400 of accounts as write-off method, and reported net income of $37,400. Determine what the net income would have been if the allowance method had been used, and the company estimated that 1.3/4% of sales would be uncollectible. using the direct