Final answer:
The service amperage that should be reported is 100 amps (A).
Step-by-step explanation:
The service amperage that should be reported is 100 amps (A). This is because the breaker and wire sizes should match the maximum amount of current that the panel can handle, which in this case is 100 amps. The panel rating of 125 amps means that it can handle up to 125 amps, but it is limited by the breaker and wire sizes, both of which are 100 amps.