Use the grid method to calculate the volume in the block of soil defined below. The grid spacing is $50$ feet by $50$ feet. All elevations are in feet. Report your answer in cubic feet.

Existing elevations $($feet$)$:

$920\mathrm{.}2920\mathrm{.}2$

$917\mathrm{.}1917\mathrm{.}4$

Proposed Elevations:

$913\mathrm{.}8912\mathrm{.}9$

$911\mathrm{.}3910\mathrm{.}7$

Report your answer to the nearest cubic foot.