I have Odoo 7. I set different payment methods of stockable products:
- effective
- credit card
- debit card
I want to set a rule like "in all sales with credit card, there is charge of 20%". For example, if the sale is $100, if the customer pays with credit card, the total of the sale is $120. How can I do this?
And how can I integrate it with POS sales? Thanks!