Costs and the BAT ModelDebit and Credit Bookkeepers needs a total of $21,000in cash during the year for transactions and other purposes. Whenever cash runs low, it sells $1,500 in securities and transfers the cash in. The interest rate is 4 percent per year, and selling securities costs $25 per sale.

1. What is the opportunity cost under the current policy? The trading cost? With no additional calculations, would you say that Debit and Credit keeps too much or too little cash? Explain.
2. What is the target cash balance derived using the BAT model?