Provide the show the complete solution, including COMPLETE DIAGRAMS (including materials and energy flows, correct labels, etc.) and ALL the ASSUMPTIONS made.

Natural gas (assume pure methane) is delivered to a city via pipeline at a volumetric rate of 4.0 Mm³ per day. If the selling price of the gas is $5.00 per GJ of higher heating value, what is the expected revenue in dollars per day? The temperature and pressure of the system are 288.15 K and 1 atm, respectively. The higher heating value is the negative of the heat of combustion with water as liquid product.