3.12.1 Charges for a fractional part of a month are calculated by counting the number of days remaining in the billing period after service is furnished; then dividing that number of days by thirty days (billing period). The result is then multiplied by the applicable monthly service charge to arrive at the appropriate fractional monthly service charge.

3.12.2 For each call, the minimum charge shall be the applicable charge for the initial billing increment of use with use in excess of the initial billing increment during a call charged at the applicable rate per minute with the fractional billing increments, if any, of each call rounded up to the next highest whole billing increment.

3.12.3 All per call charges of fractional cents shall be rounded to the next full cent unless otherwise stated in the specific product description (Section 4).
 

4.1.1 The following MTS service arrangement allows a Customer to originate intrastate calls in areas with Equal Access capabilities served by the Company by presubscribing to its MTS long distance calling service plan.