A Lab Orders 100 Rats a Week for Each of the 52

Multiple Choice

A lab orders 100 rats a week for each of the 52 weeks in the year for experiments that the lab conducts. Prices for 100 rats follow the following distribution:
$$\begin{array} { l | r r r } \text { Price: } & \$ 10.00 & \$ 12.50 & \$ 15.00 \\\hline \text { Probability: } & 0.35 & 0.40 & 0.25\end{array}$$
How much should the lab budget for next year's rat orders be, assuming this distribution does not change?

A) $780
B) $520
C) $637
D) $650