Fuction: SUM; Formula: Subtract, Multiplya Cell Referencing Using Excel to Create an Aglns Schedule PROBLEM Ward Products uses an aping schedule to determine its estimated uncollectible accounts at December 31 . Student Work Area. Required: Provide input into cells shaded in vellow in this template. Use mathematical formulas with cell references to the Problem area and this work area as indicated. Use the SUM function with cell referencing to add amounts. Determine the required balance in the Allowance for Doubtful Accounts and the carrying amount of the accounts receivable