can someone help me with this question?

Brown Cow Dairy uses the aging approach to estimate Bad Debt Expense. The balance of each account receivable is aged on the basis of three time periods as follows: (1) 1-30 days old, $11,200; (2) 31-90 days old, $4,200; and (3) more than 90 days old, $2,200. Experience has shown that for each age group, the average loss rate on the amount of the receivable due to uncollectibility is (1) 6 percent, (2) 10 percent, and (3) 20 percent, respectively. At December 31 (end of the current year), the Allowance for Doubtful Accounts balance was $720 (credit) before the end-of-period adjusting entry is made. Required 1. Prepare a schedule to estimate an appropriate year-end balance for the Allowance for Doubtful Accounts 1-30 31-90 90 Total 0 Accounts Receivable Estimated uncollectible Estimated Uncollectible 2. What amount of Bad Debt Expense should be recorded on December 31? mount of Bad Debt Expense