Eastwood Grocers' budgeted monthly sales are R3 000. 40% of its customers pay in the first month and take the 2% discount. The remaining 60% pay in the month following the sale and don't receive a discount. The company's bad debts are negligible. Purchases for next month's sales are constant each month at R1 500. Other payments for wages, rent, and taxes are constant at R700 per month. What is the firm's average cash gain/loss during a typical month