Why is there a difference between the contracted rate and the average rate per minute calculated on most Service Providers invoice?
The Service Providers rounds the cost of a call up to the nearest whole cent, where applicable. If the cost of a call is $.XX1 through $.XX9, we round up to the nearest penny. Therefore, your per minute rate may vary slightly on a per call basis from your stated rate simply due to the mathematics of rounding. Rounding Long Distance call durations are calculated by rounding up to the nearest 6-second increment.
