the mail? (2) In the bank? b. What is the total amount of idle money in transit? c. What is the annual cost of the funds (1) In the mail? (2) In the bank? d. What is the total annual cost of the idle funds? 9. (Accelerating collections) A company receives cash inflows of US$6 million per day from customers in North America. Checks take six days on average to arrive, but a large commercial bank has proposed to implement a lock box-concentration banking system der for a $3 million annual fee which would cut the time a check is in receivables float to an average of three days. The company's marginal tax rate is 35%. What is the value of the proposed system to the company, and should it be implemented, if the company's cost of capital is: DO a. 8%? c. 12%? b. 10%? d. 15%?lists