Use the Following to Answer Questions: Table: GoodsClassification
Shirt
Rainfall

Essay

Use the following to answer questions: Table: GoodsClassification
Shirt
Rainfall
Smog Reduction
PlayStation Controller
Cable TV
National Defense
Baltimore Aquarium
Chewing Gum
Your Economics Textbook
Free Public Library
Your Teacher's Open Office Hours
Pen
Free Public Bus Service
-Table: Mosquito Spraying $$\begin{array} { | r | r | c | c | c | r } \hline & & \text { Family A } & \text { Family B } & \text { Family C } & \\\hline & \text { Number of } & \text { Marginal } & \text { Marginal } & \text { Marginal } & \text { Marginal cost } \\\hline & \text { sprayings } & \text { benefit } & \text { benefit } & \text { benefit } & \text { of spraying } \\\hline & 1 & \$ 50 & \$ 80 & \$ 30 & \$ 80 \\\hline & 2 & 40 & 60 & 10 & 100 \\\hline & 3 & 20 & 40 & 5 & 135 \\\hline & 4 & 10 & 20 & 1 & 147 \\\hline & & & & & \\\hline\end{array}$$
Refer to the table. A small town consists of three families who live in an area with lots of mosquitoes. The town is considering a spraying program to control the mosquito population. The marginal benefits of the spraying program are provided for each family, along with the marginal costs of the spraying program. How many times should the town spray for mosquitoes?