CAR-71690 company purchases battery powered bikes from a manufacturer for $1,515 per unit and then sells them to its customers for $2,900 each. The company's monthly selling and administrative costs are the following: Costa Selling: Advertising Sales salaries and commissions Delivery of bikes to customers Utilities Depreciation of sales facilities Administrative: Executive salaries Insurance Clerical Depreciation of office equipment Cost Formula $ 958 per month $ 4,785 per month, plus 5% of sales $ 61 per unit sold $ 641 per month. $ 4,965 per month $ 13,545 per month $710 per month $ 2,504 per month, plus $41 per unit sold $ 859 per month Last month CAR-71690 sold 59 units. How much was the company's total contribution margin for the month? $ 89,385 $ 81,715 $ 67,142 $ 103,958