Marr Co. had the following sales and accounts receivable balances, prior to any adjustments at year end: Credit sales $10,000,000 Accounts receivable 3,000,000 Allowance for uncollectible accounts (debit balance) 50,000 Marr uses 3% of accounts receivable to determine its allowance for uncollectible accounts at year end. By what amount should Marr adjust its allowance for uncollectible accounts at year end