the barometric height in a town is 65 cm is equal to standard atmospheric pressure is 75cm kg and the density of mass 13600 kg/m^3,determine thevattitude of the town​

An electric power distributor charges residential customers $0.10 per kilowatt-hour (kwh). the company advertises that "green power" is available in 150 kwh blocks for an additional $4 per month. (green power is generated from solar, wind power, and methane sources.) if a certain customer uses an average of 391 kwh per month and commits to one monthly 150 kwh block of green power, what is her annual power bill