In this unit, students learn all about calculating cost, change, sales, and discounts. There are also activities such as calculating the cost for furnishing a dorm room built in, as well as 2 quizzes and an answer key for the entire unit. This unit was designed for special education students in high school, but it is relevant for any class. Note: This unit is based on the Massachusetts tax rate of 6.25% and Massachusetts tax policies. You are more than welcome to modify the unit to work wit