How to add a variable option to cart total?
I'm trying to add an option "Pay by Instalment" on the cart Page.
As I'll be invoicing customers manually from PayPal, all I need is:
Give an option to customer to pay instalments increasing total amount in the cart.
If customer chooses to pay by instalments (clicks on check box), certain percentage (e.g 10%) is added to the bottom cart total amount.
This amount needs to be recorded on Order Summary table and Order Detail table.
Can you suggest how can I do this?