APPLY YOUR KNOWLEDGE Lakeville High School uses oil and electricity to heat and light the school. The total square footage of the school is 30,000 ft2. The school used 390,000 gallons of oil in 2017 at a cost of $52.00 per barrel. There are 42 gallons in a barrel. The school also used 2,700,000 kWh of electricity at $0.075 per kWh. A. What is the total cost of utilities for the school?

B. Calculate the number of BTU used per square foot per year. There are 150,000 BTU in 1 gallon of oil, and 3,413 BTU per kWh.

C. Calculate the cost per square foot per year for utilities.