admin related credit

English to Polish Tech/Engineering Telecom(munications)

"Usage airtime is calculated by considering opening balances on customer’s accounts, top ups during the period and closing balances on customer’s accounts."

A dalej tabela:

"A. Opening balance on subscribers accounts - [wartości]

B. Total top ups applied during the accounting period (including initial SIM credit, Promotional credit & **Admin related credit**) - [wartości]

C. Closing balance on subscribers accounts - [wartości]

USAGE REVENUE (A + B – C)"

będę ogromnie wdzięczna za pomoc