Tiffany plans to use $275 she earned from a summer job to buy some new clothes for school. she found several items she likes but is trying to decide if she has enough money to buy all of them. she wants to buy three pairs of jeans for $42 each and five shirts with an average cost of $27 per shirt. she will have to pay 6.5 % sales tax. if she buys all of these items, how much tax will she have to pay?