[Skunkworks] KPLC pre-paid meters

Hey Skunk(ette)s, For those who've used the KPLC pre-paid meters: When electricity rates change, how is KPLC able to adjust the rates on the pre-paid meters? i.e. If one buys Elec that can last for a couple of months, then KPLC's rate doubles the next month, what happens? In the old system, the monthly bill would show the adjusted rate and payment. o_o?