The Timberline firm expects a total cash need of $12,500 over the next 3 months. They have a beginning cash balance of $1,500, and cash is replenished when it hits zero. The fixed cost of selling securities to replenish cash balances is $3.50. The interest rate on marketable securities is 8% per annum. There is a constant rate of cash disbursement and no cash receipts during the month. What is the total opportunity cost for a month based on the firm's current practice?

		A. $5.00
		B. $18.98
		C. $27.92
		D. $60.00
		E. None of these.