The Sandhill Pet Store sells Diva Doggie pet waste disposal systems for $80 each. The systems include the unit and a one-year supply of enzyme digester waste terminator. The cost of the unit and enzyme is $44. The only other costs are fixed costs of $2,952. During the current period, Sandhill sold 588 of the units through the store's new on-line catalog division. What is the contribution margin per unit? (Round answers to O decimal places, e.g. 25.) Contribution margin per unit eTextbook and Media $ What is the contribution margin ratio? (Round answers to O decimal places, e.g. 25.) Contribution margin ratio eTextbook and Media %