purchases bikes from a manufacturer for $1,486 per unit and then sells them to its customers for $2,700 each.

monthly selling and administrative costs are the following:

Costs	Cost Formula
Selling:
Advertising	$ 954	per month
Sales salaries and commissions	$ 4,794	per month, plus 3% of sales
Delivery of bikes to customers	$ 63	per unit sold
Utilities	$ 654	per month
Depreciation of sales facilities	$ 4,985	per month
Administrative:
Executive salaries	$ 13,565	per month
Insurance	$ 703	per month
Clerical	$ 2,475	per month, plus $38 per unit sold
Depreciation of office equipment	$ 877	per month

total contribution margin for the month?