Roster co. adjusts its allowance for doubtful accounts at year end. the general ledger balances for the accounts receivable and the related allowance account before adjustment were $1,500,000 and $45,000, respectively. roaster uses the percentage-of-receivable method to estimate its allowance for doubtful accounts. accounts receivable were estimated to be 4% uncollectible. what amount should roaster record as an adjustment to its allowance for doubtful accounts at year end?