1.Fixed Fees (Monthly Plan, Local, PICC, 911, LNP, Fed.
Access
Charges, etc...)
2.Metered Usage (per call & per minute rates)
3.Per-line Allowances
4.Taxes & Fees (Fed. Tax, State Tax, Gross
Receipts, Local Tax,
FUSF)
5.Evening/Night Discounts
6.Billing Increment effects
7.Sub-Account Monthly Commitment Levels, Fees, Allowances, Volume Discounts
8.Discrete call-level or aggregated usage data entry
Fidelity of Calculations