Figure 23-2
the Following Information Is Available for Maintenance Costs

Essay

Figure 23-2
The following information is available for maintenance costs: $$\begin{array} { l c c } \text { Month } & \text { Production Volume } & \text { Maintenance Costs } \\\text { January } & 75 & £ 250 \\\text { February } & 115 & 310 \\\text { March } & 190 & 400 \\\text { April } & 60 & 240 \\\text { May } & 135 & 355\end{array}$$
-Refer to Figure 23.2 in the above question. Using a computer or calculator, compute the estimate of maintenance costs at 100 units of production using the method of least squares. This value would be
a.£291.
b.£321.
c.£336.
d.£698.