Feet.First industries plars to se. 7,750 sleds at $55 each in the coming year. Variable cost is 60 percent of the sales price. Fixed factory overhead equals $42,550 and fived selling and administrative expense eosals $34,780. a. Caiculate the units that Feet.First mustsell in order to break even. b. Cakculate the sa'es revenue that feet.first must earnito bresk even by using the contribution margin? C Confirm your ancwer in requirement b, by mulipling the fumber of biewkeven unts in requirement a by the unt salesprice