Les and Ashley are selling wrapping paper for a school fundraiser. Customers can buy rolls of plain wrapping paper and rolls of holiday wrapping paper. Lea sold 9 rolls of plain wrapping paper and 5 rolls of holiday wrapping paper for a total of $137. Ashley sold 2 rolls of plain wrapping paper and 10 rolls of holiday wrapping paper for a total of $146. What is the cost each of one roll of plain wrapping paper and one roll of holiday wrapping paper? ​