Wisconsin Paper Company is considering establishing a zero-balance system for its
payroll account. The firm pays its employees every 2 weeks on Friday (that is, 26
pay periods per year). Currently, the firm deposits the necessary funds in the payroll
account on Friday to cover the total amount of the checks written each pay period,
which averages $1 million. However, the firm has found that the majority of the
checks did not clear the payroll account until the following week. A typical distribution
of when the checks clear the payroll account is as follows:

Assume that the firm can earn 6 percent on any funds released from its payroll
account using a zero-balance system. •a. Determine the annual pretax returns the firm would realize from the use of a
zero-balance system for its payroll account.
b. What additional information is necessary to make a decision concerning the
desirability of establishing such a system?