With the DPP calculator, you get an overview of your monthly costs. The billable targets currently in scope are automatically added to the list. The partner level shown is calculated based on those targets.

The more targets you assign to your customers, the lower the manufacturer purchase price (DPP) gets and the higher your partner level will be (Silver 1-3, Gold 1-3, Platinum 1-3).
Actual usage will be billed at the end of the month via your distributor. More info about billing can be found here.