Question 6 1 pts [Read carefully.) On December 31, 2020, Acme Yard Service had ending balances as shown below: Sales revenue $420,000 Accounts receivable 115,000 Allowance for doubtful accounts 3,500 (before any year-end adjustment) Acme uses the percent of sales method and estimates that 2% of sales will prove uncollectable. What is Acme's bad debt expense for the year? $3,300 $8,400 $2.300 $2.800