Lena Owns a Restaurant Which Was Damaged by a Tornado

Lena owns a restaurant which was damaged by a tornado. The following assets were partially destroyed: $$\begin{array} { | l | r | r | r | } \hline &{ \text { Basis } } & \text { Reduction in FMV } & \text { Insurance Payment } \\\hline \text { Building } & \$ 150,000 & \$ 200,000 & \$ 100,000 \\\hline \text { Equipment } & \$ 30,000 & \$ 20,000 & \$ 10,000 \\\hline\end{array}$$ Lena has AGI of $50,000. What is the amount of Lena's deductible casualty loss?

A) $54,900
B) $60,000
C) $70,000
D) $180,000