A power generation facility burns fuel gas in a combustion reaction where the heat generated is used to create the steam supplied to the turbine. Before it enters the burner, the fuel gas passes through a meter where it is determined that the mass flowrate is 2000 lb/h at 250 psig and 75 F. The gas is comprised of 96% methane, 3% inert gases, 0.2% oxygen, and 0.8% CO2. You may assume steady-state flow conditions. Calculate the total potential heat energy in therm units of the gas over a period of 10 days.