That's such a hard quiestion to answer because there are a lot of factors that typically affect electricity costs. Every household consumes electricity differently. Some things to consider that affect electric cost is the size of house or apartment, whether or not there is proper or sufficient insulation, the type of windows, roofing and doors, are the appliances energy efficient, is there a pool, are there shades, shutters or trees nearby deflecting heat from the sun, is the AC thermostat on a timer or continuously running, etc. All these things will affect energy consumption and directly affect cost.
With that said, according to recent consumer statistics, FPL (Florida Power & Light) charges an average of 11.5cents per kWh for electricity and in March 2013 it was less than the nationwide average of 12.8 cents per kWh. Also, the local price of electricity in the Miami area in March was at least 10 percent less than the U.S. over the last three years. This could be due to cooler winter temperatures and the fact that most Floridians donâ€™t use electric heat the way most northerners do to keep warm. More importantly to keep in mind is that there is a cost increase after the first 1,000 kilowatt-hours to encourage people to use less energy.
The best way to get an answer to your question is to contact FPL directly or go to their website at http://www.FPL.com