Imagine your class is having a pizza party. Work with your group to plan what to order and to estimate what the party would cost. 1. Record your group's plan and cost estimate. What would It take to convince the class to go with your group's plan? Be prepared to explain your reasoning 2. Write down one or more expressions that show how your group's cost estimate was calculated. 3. a. In your expression(s), are there quantities that might change on the day of the party? Which ones? b. Rewrite your expression(s), replacing the quantities that might change with letters. Be sure to specify what the letters represent. llustrathy