The assistant treasurer of Monroe Tires, Inc., is trying to determine what the appropriate cash return level should be. The company's cash balances have been fluctuating wildly because of unpredictable and wide-ranging receipts and disbursements. The best estimate of annual disbursements is $5,000,000. The investment broker charges $75 per securities transaction. Short-term investment interest rates are 12 percent. The company does not mind a $0 cash balance but does not want the balance to be negative. 6