A family spent \$235.25 in the month of February to heat their house.
a) Calculate the kilowatts of energy they consumed given that the price of electricity is \$0.09/kWh (kilowatt hour). Assume there are 28 days in February.
I came up with 672 kW, but I think that's wrong because 672 kW $\times$ \$0.09/kWh doesn't add up to \$235.25.
I think the problem I'm having here is that I'm not understanding what a kWh is. I know that a kWh is 1$\,$kW $\times$ 1$\,$h, but I don't know what that means. I mean, kWh is not the same as 1 kilowatt per hour, so what does kW $\cdot$ h mean?
Also, I don't think I understand what this problem wants. Do they want the kilowatts the family used in 28 days?