Chapter 11.3, Problem 51E

Revenue The vector $\text{u}=\langle 3240,1450,2235\rangle$ gives the number of hamburgers, chicken sandwiches and cheeseburgers, respectively, sold at a fast food restaurant in one week. The vector $\text{v}=\langle 2.25,2.95,2.65\rangle$ gives the price (in dollars) per unit for the three food items. Find the dot product $u\cdot v$ and explain what information it gives.