Math help please

Question

A frozen yogurt shop sells plain frozen yogurt in cups that are 4 ounces or larger with toppings at an additional charge. A 4 ounce cup of frozen yogurt costs $6. Each additional ounce costs $1.50, and each additional topping costs $0.75.

Write an equation that represents the cost of a frozen yogurt. Be sure to specify what the variables represent.

Answer 1

C = total cost; Z = no. add'l ozs; T = no. add'l topping.

We start with the basic 4 oz. cup for $6. The add'l oz(s) would cost 1.5 @ $1.50 for each.. The add'l topping(s) would cost 0.75T @ $0.75 each. So C = 6 + 1.5Z + 0.75T