San Mateo Company had the following account balances at December 31, 2018, before recording bad debt expense for the year: Accounts receivable $ 1,400,000 Allowance for doubtful accounts (credit balance) 22,000 Credit sales for 2018 1,950,000 San Mateo is considering the following approaches for estimating bad debts for 2018: Based on 3% of credit sales Based on 6% of year-end accounts receivable What amount should San Mateo charge to bad debt expense at the end of 2018 under each method