Trace the number back to the reading.
Check the reading type
Actual, customer-submitted, estimated, corrected, and unreadable meters are named before any explanation of usage.
Rebuild the calculation
Dates, units, tariff bands, fixed charges, tax, previous balance, payment, and adjustments appear in a plain sequence.
Offer more than one cause
Season, guests, appliances, leaks, meter faults, billing errors, and unknowns remain possible until evidence narrows them.
