Steps
Go to Rental order management > Rental agreements > All rental agreements.
In the list, click the link in the selected row.
Click Details.
In the list, find and select the desired record.
Click Edit.
Select the Active check box.
In the list, mark the selected row.
In the Consumption price field, enter a number.
In the Per field, enter or select a value.
In the Per field, type a value.
In the list, find and select the desired record.
In the Consumption price field, enter a number.
In the Per field, enter or select a value.
In the Per field, type a value.
Click Price tiers.
Click New.
In the Consumption to field, enter a number.
In the Multiplier field, enter a number.
Use the shortcut for saving a record.
Close the page.