please help me wirh the right equations to type into excel!

A1 f. Formulass Divide; Subtracticell Hefermaing 1 Form as: Dhide; Subtract Cell Relerencing 3. Be4,4-Using Excel to Determine Volume, Varisbla Cost, and Contribution Marein PROBLEM 6 Molly's Marbles incurred variable and fined cosits in generating sales for 7 the month of September, Marbles are sold In small bags with each bait 8 contider to be one unit, Information concerning operations for the 9 month of September follows 10111213TotalsalesTotalcontributionmarginSellingpriceperunit 15. 16 17 11 15 20 Required: Prowide input into cells shaded in vellow in this template. irpat the required mathematical formulas or functions with cell references lo the Problem area or workarea is indkated: How many units did Molly sell that mocuh? Number of units sold What was ber yariable cost per unit? Variable cost per unit What is the contribution wares oer unit