Can i get some clarification here? I don't understand 100% the formulas to answer these.

Prepare a contribution margzn by product report Calculate the contribution margin ratio for each Refer to the Amount Oescriptions list provided for the exact wording of the answer choices for text entries. Revenues Variable cost of goods sold Manufacturing margin Variable selling expenses Contribution margin Contribution margin ratio PowerTrain Sports Inc. Contribution Margin by Product Mountain Monster 51.08 0.62 1.08 sou 24.0% Score: 32/78 Deset Dragon 51.14 0.65 so.}4 1.13 50.15 14.0%