Suppose 150 tennis balls fit in a 2 ft X 1.5 ft X 2.5 ft box, how many tennis balls will be needed to fill a classroom with dimensions 20 ft X 28 ft X 8 ft?

The john nash mall used 17,4000 kilowatt hours in may, with a peak load of 92 kilowatts. the demand charge is $5.95 per kilowatt, and the energy charge is $0.08 per kilowatt hour. the fuel adjustment charge is $0.017 per kilowatt hour. what is the total electricity cost for may?