Jill and Alberto are selling wrapping paper for a school fundraiser. Customers can buy rolls of plain wrapping paper and rolls of holiday wrapping paper. Jill sold 1 roll of plain wrapping paper and 3 rolls of holiday wrapping paper for a total of $67. Alberto sold 6 rolls of plain wrapping paper and 3 rolls of holiday wrapping paper for a total of $147. Find the cost each of one roll of plain wrapping paper and one roll of holiday wrapping paper.​