Calculating Reserved Amounts

To calculate the current and total reserved amounts and also the recommended payment, the following parameters of the service providing scheme are used:

• billing period,

• charging period,

• charging type: at the beginning (prepayment) or at the end (postpayment) of the charging period, and

• reservation period — period for calculating the current reserved amount.

Reserved amounts and the recommended payment are calculated on the basis of the reserved rows of the charge logs in force.

So:

• Total reserved amount is calculated as the sum of all the reserved rows in the charge logs in force, and

• Current reserved amount is the sum of the reserved rows in the charge logs in force which have a charge date between the current date and the current date plus the reservation period.

Examples Showing How the Current Reserve Amount is Calculated

The reservation period cannot be greater than the charging period.

Billing period — 30 days, charges are made every 10 days (one line of the charge log corresponds to the cost of services for 10 days). Cost of monthly recurrent services — $30.

Table showing current reserved amount:

Billing period, days	Current reserve amount (sum of the reserved rows in the charge log), $
	Reservation period = 10 days		Reservation period = 30 days
	Prepayment	Postpayment	Prepayment	Postpayment
1–10	10 (one row)	10 (one row)	20 (two rows)	30 (three rows)
11–20	10 (one row)	10 (one row)	10 (one row)	20 (two rows)
21–30	0	10 (one row)	0	10 (one row)

If several services with different reservation periods and/or charging periods are charged to the one customer account, their total current reserved amount is calculated as the sum of current reserved amounts for each service.