personally, it puts me into a confusing state, and i'll have to see what the bill looks like.

if the line order in the calculation remains the same, my previous calculation is correct, and my bill will go from $1.00 to $8.00. this is because they take the $45 credit out before they add the tax or the rebate. so, i have to eat the rate increase, but then i don't get the rebate to offset it.

my calculation is this:

1.13*(x*1.55 + f  - 45) - .318(1.13*x*1.55 + 1.13f - 1.13*45) =     (f=27)
1.13*(1.55x -18) - .318(1.7515x -20.34) =
1.194523x -13.87188

that seems better at first, except that my old bill was:

1.13*((x + f) - 45) - 0.08(1.13*(x+f-45)) =       (f=27)
1.13*(x-18) - 0.0904(x-18) =
1.0396(x-18) =
1.0396x - 18.7128.

subtracting out, i get the 15.5% increase, but am now adding an extra $4.84. static. and, that doesn't change with usage.

that means if my x is $19, my increase in cost only seems to be $2.94, but then i have to increase that by $4.84 rather than subtract it by $7.26.

how can i reverse that and get back to saving credits?

x*1.55 + 27 <  45 <----> x*1.55 < 18 <----> x < $11.60.

when i first moved in here, before i had the fan running all of the time, i was actually able to get my usage to less than $10. so, i know i can do it, if i can get the air quality in here cleared out enough that i can get the fans off.

in the mean time, as mentioned, i'm going to have to start turning off the modem when i'm not using it, and essentially completely disconnect everything during the day.