Tanek Industries manufactures and sells three different models of wet-dry shop vacuum cleaners. Although the shop vacs vary in terms of quality and features, all are good sellers. Tanek is currently operating at full capacity with limited machine time Sales and production information relevant to each model follows. Product Econom Selling price Variable costs and expenses Machine hours required $ 39 $ 21 0.5 StandardDeluxe 129 59 1.6 $ 65 $ 26 0.8 Calculate contribution margin per unit. Product Standard Econom Deluxe Contribution margin per unit g LINK TO TEXT VIDEO: SIMILAR PROBLEM Ignoring the machine time constraint, which single product should Tanek Industries produce