Step 1 - Navigate to Billing Items Screen:
Go to Admin(A) => Billing(B) => Billing Items(C)
Step 2 - Add New Billing Item
Create the Billing Item categories for each funding source by using Add New(D)
Step 3 Create the Billing Item:
Enter a Description(A) and specify the Unit Type(B) of the Billing Item. Press OK(C) to save the billing item
Unit Types For Billing Items
Unit - Used for all charges, except those that factor off mileage or are calculated by hour
Mile - Used for any charge that is based on the mileage of the trip