Given the following mixed costs at various levels of production, complete the requirements.

\begin{tabular}{lcc}

\hline Month & Units Produced & Mixed Costs \\

\hline January & 2 & $\$ 13.75$ \\

February & 3 & 16.50 \\

March & 1 & 11.00 \\

April & 5 & 22.00 \\

May & 2 & 13.75 \\

\hline

\end{tabular}

1. Plot the data on a scattergraph, and visually fit a straight line through the points.

2. Based on your graph, estimate the monthly fixed cost and the variable cost per unit produced.

3. Compute the total cost of producing 8 units in a month, assuming that the same relevant range applies.

4. Why is it so important to be able to determine the components of a mixed cost?