A firm sells goods with an average retail price of $70 and a cost of $55 per unit. Customers currently pay 60 days after the date of purchase. The company's cost of capital is 6%. The company is proposing changing its credit collection policy to offer 1/10, net 60. Required: a) Calculate the company's profit under the current policy. (2 marks) b) Calculate the company's profit under the proposed policy. (4 marks) c) Explain whether or not the credit policy should be changed. (1 mark)