Unit Rates in Real Life Starbucks Hot Chocolate, created by Tricks and Treats for Teaching Math, with ANSWER KEY. This provides a great warmup, with simple division to figure the unit rate of cents per ounce of hot chocolate. It does not require any rounding. Students are easily able to do the division to figure the unit rate, then decided which size of Hot Chocolate is the better buy. Please checkout my other 350+ great teaching resources. Thank you kindly for your purchase.