Enter formulas in cells that contain question marks (only use formulas). After entering formulas in all of the cells that contain question marks, verify that the amounts match the example below. (a) Estimated Amount Uncollectible $3,600+$3,100+$2,000+$1,600+$7,200=$17,500 Check your worksheet setup and formulas by changing the 'Over 90 days past due' amount to $19,000, and the Allowance for Uncollectible Accounts balance at the end of the period to $1,500 (credit). You should now have an estimated uncollectible amount of $25,500 and an adjustment amount of $24,000. If you do not get this answer, review your worksheet and the formulas you used