Wren company had the following account balances at december 31, year 1: accounts receivable $ 900,000 allowance for doubtful accounts before any provision for year 1 doubtful accounts expense) 16,000 credit sales for year 1 1,750,000 wren is considering the following method of estimating doubtful accounts expense for year 1: • based on credit sales at 2% • based on accounts receivable at 5% what amount should wren charge to doubtful accounts expense under each method?