Question 16 (Mandatory) (6 points) Determine the amount to be added to Allowance for Doubtful Accounts in each of the following cases. Indicate the ending balance in each case. (6 points) (a) (b) Debit balance of $600 in the allowance account just prior to adjustment. Analysis of accounts receivable indicates doubtful accounts of $8.500. Credit balance of $250 in the allowance account just prior to adjustment. Uncollectible accounts are estimated at 2% of sales, which totaled $1.000.000 for the year