A pastry chef who specializes in special occasion cakes uses the following equation to help calculate the

Question:

A pastry chef who specializes in special occasion cakes uses the following equation to help calculate the price of a cake: y = -26.279 + 14.855x1 + 3.1035x2 + 0.73079x3, where x1 is the number of layers desired, x2 the number of servings needed, and x3 the amount of filling mix used. Calculate the price of a three-layer cake to serve 48 people using 40 ounces of filling.