Adrian wants to start a business printing custom logo T-shirts. The required equipment costs $2,500 and that each shirt will require $6.34 in materials. He estimates that he can sell 600 shirts in his first month of operations, and is hoping to recoup his equipment costs over that period. For full marks your answer should be rounded to the nearest cent. a) What must his contribution margin be to achieve this? Contribution Margin = $ 0.00 b) What selling price does this correspond to? Selling Price = $ 0.00