Tony and Jacob are selling fruit for a school fundraiser. Customers can buy small boxes of grapefruit and large boxes of grapefruit. Tony sold 12 small boxes of grapefruit and 8 large boxes of grapefruit for a total of $276. Jacob sold 6 small boxes of grapefruit and 9 large boxes of grapefruit for a total of $228. find the cost each of one small box of grapefruit and one large box of grapefruit