Ohioans’ electric bills charge for more than the cost of making and delivering the electricity. With different utilities serving specific parts of the state, Ohioans’ electric bills and the tariffs that govern them vary. But they all have one thing in common: They’re hard for many people to understand. And the bills don’t clearly detail all charges to consumers. Here’s a guide to what all the small print says — and what it doesn’t say — on a sample bill from June for a residential customer of FirstEnergy’s Illuminating Company.