The Following Table Shows the Predicted and the Actual Sales

Multiple Choice

The following table shows the predicted and the actual sales of a firm in the quarters of a year.
Table 4-1
$\begin{array}{l}\begin{array} { | c | c | c | } \hline&\text { Predicted Sales}&\text { Actual Sales }\\ \text { Quarter } & \text { (in dollars) } & \text { (in dollars) } \\\hline 1 & 20 & 19 \\\hline 2 & 22 & 20 \\\hline 3 & 24 & 21 \\\hline 4 & 28 & 26 \\\hline\end{array}\end{array}$
-Calculate the sum of squared errors of the observations from Table 4-1.

A) 20
B) 34
C) 18
D) 22
E) 15