If the admin wish to add any charge, they can do it with great ease , by clicking on the button which states Add Charge.
Click on the drop-down list and select the Charge Type.
Specify the amount per Unit.
Here you need to specify the number of units by Click on the Drop-down List.
Click on the Drop-down List and Select the Unit Type.
Select the appropriate radio button based on the TAX.
Click on Add Changes button to save the changes into LinguisTricks System.