Provide an Appropriate Response $V = \frac { 1 } { 3 } h \left( a ^ { 2 } + a b + b ^ { 2 } \right)$

Provide an appropriate response.
-The formula used to find the volume of the frustum of a square pyramid is $V = \frac { 1 } { 3 } h \left( a ^ { 2 } + a b + b ^ { 2 } \right)$ , where $\mathrm { b }$ is the length of the base, $\mathrm { a }$ is the length of the top, and $\mathrm { h }$ is the height. Calculate the volume if $a = 271$ feet, $b = 671$ feet , and $h = 207$ feet.

A) $146,043,261$ cubic feet
B) $48,691,087$ cubic feet
C) $48,681,087$ cubic feet
D) $48,682,087$ cubic feet