[JensenDied]

OP: This is your ISP.

Per your methodology we have adjusted your rate based upon services rendered. We are also adjusting your bill based upon exemplary upload performance.

((6.89/7)+(0.78/.75))/2 * 80

Amount Due: $80.97

[logn]

Thanks. I guess you'll then take into account the variable bandwidth and charge me accordingly each month? Perfect.

-Your customer

[JensenDied]

That is what having an SLA ought to be for. OP paying for "up-to" service doesn't really have grounds here for either of these.