Exercise $3-4$A $($Algo$)$ Determining variable cost from incomplete cost data LO $3-1$

Campbell Corporation produced $217,000$ watches that it sold for $$18$ each during year $2.$ The company determined that fixed manufacturing cost per unit was $$9$ per watch. The company reported a $$868,000$ gross margin on its year $2$ financial statements.

Required

Determine the variable cost per unit, the total variable cost, and the total contribution margin.