Jennifer and Jasmine are selling fruit for a school fundraiser. Customers can buy small boxes of grapefruit and large boxes of grapefruit. Jennifer sold 8 small boxes of grapefruit and 14 large boxes of grapefruit for a total of $254. Jasmine sold 1 small box of grapefruit and 14 large boxes of grapefruit for a total of $191. How much does one small box of grapefruit cost?