The Campus Bookstore Asked a Random Set of Freshmen and Seniors

The campus bookstore asked a random set of freshmen and seniors how much they spent on textbooks for that term. The bookstore believes that the two groups spend the same amount. What is the test value?
$\begin{array}{|l|c|c|}\hline & \text { Freshmen } & \text { Seniors } \\\hline \text { Sample size } & 80 & 60 \\\hline \text { Mean spending } & 40 & -15 \\\hline \text { Sample variance } & 400 & 800 \\\hline\end{array}$

A) 3.00
B) 4.28
C) 12.85
D) 2.00