Does your electric bill state the amount of kwh that 45 includes?

I see one here for US$28.55 for 140 KW. Unless they changed it the first usage is at a very low rate, then more KW usage at an in between rate, then a higher rate for bigger users.

There are several rate structures. I have 2 commercial meters and 2 residential meters. The residential meters are usually around 100 bzd a month, and because they are under 150 bzd a month, we are not charged the 10% GST. The residential rate for Caye Caulker is .41 bzd per KWH. My residential meter on the mainland has almost the same cost per KWH. The commercial rate for Caye Caulker is .45 bzd per KWH, and the bills are usually over 150 bzd, so the 10% GST is tacked on.