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 Economy Standard Deluxe Selling price $44 $74 $147 Variable costs and expenses $24 $29 $69 Machine hours required 0.5 Calculate contribution margin per unit. Product Standard Economy Deluxe Contribution margin per unit $ e Textbook and Media Ignoring the machine time constraint, which single product should Tanek Industries produce? e Textbook and Media What is the contribution margin per unit of limited resource for each product? (Round answers to 2 decimal places, eg. 10.50) Economy Standard Deluxe Contribution margin per limited resource e Textbook and Media If additional machine time could be obtained, how should the additional time be used? The additional time should be used to produce the