A $2\mathrm{.}7$ acre wet pond was monitored for five months $($from May $1$ through September $30)$ and the following data collected:

Starting stormwater volume $=220,000cf$

Ending stormwater volume $=180,000cf$

Total inflow volume $=91,000cf$

Total outflow volume $=77,000cf$

Direct precipitation onto the pond $=12\mathrm{.}4$ inches

Average pan evaporation rate $=0\mathrm{.}10$ inches$/$day

Estimate the volume of water that infiltrated into the existing soil below the pond $(5$ points$)$