I have used this assignment with my students to show them how a bill is calculated when you go out to dinner and to reinforce sales tax, discounts, and tip.
You can either get menus from a local restaurant or schedule time for your students to go to the computer lab to look up a menu. Have them get into groups (3-5 students). They will decide on two appetizers to share and each student will pick out their dinner and dessert. Given the directions, they will find the Total, Discount (after given their coupon), Subtotal, calculate tax, and Grand Total. After that, they will calculate how much tip they will be leaving. If time permits, let them paste their receipt to a larger paper and let them decorate. This activity usually takes about 80mins.
** Coupons Included**