Q 5(a) [8 Marks) Doyle Limited is a successful manufacturer of computer accessories. The financial manager of Doyle Limited wants the business to keep a minimum cash balance of 2.400.000 at all times. The manager calculates that keeping this minimum amount of cash will suffice to cover all liquidity purposes, safety purposes, profitability purposes and any potential short-term investment opportunities that may arise. The typical financial transactions fees charged to Doyle Limited, by financial Institutions were on average 280 per transaction. While the interest rate charge on all cash borrowed is currently at 6% per annum. The manager has conducted an analysis of past daily cash flows balances and has concluded that the standard deviation of daily cash balances are 8.400 per day. Requirement: Using the Miller Ort model calculate the Spread' of Doyle Limited's cash balances and the 'upper limit' of cash balances and also the "ideal (return) level of cash