Meter multiplier: PE Power Measurement and Instrumentation practice question

An industrial customer is served at 13.8 kV, three-wire, with primary metering. A 2-element transformer-rated meter is fed by two 200:5 CTs and two 14,400:120 V VTs connected open-delta. The meter's register has no internal multiplier and reads the energy delivered to its secondary terminals. Over one billing month the register advances from 18,452.6 kWh to 18,961.4 kWh.

The primary energy delivered to the customer for the month is most nearly: