company purchases battery powered bikes from a manufacturer for $1,485 per unit and then sells them to its customers for $2,900 each. The company's monthly selling and administrative costs are the following: Costs Cost Formula $ 952 per month 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 Last month $ 66,690 $ 80,655 $98,610 $ 84,645 $ 4,800 per month, plus 5% of sales $ 62 per unit sold $ 657 per month $ 5,095 per month $ 13,567 per month $ 693 per month $2,538 per month, plus $38 per unit sold $ 859 per month sold 57 units. How much was the company's total contribution margin for the month?