Hi,
I understood that. I'm sorry, I wasn't clear enough in my previous message. What I meant is that the option product UNIT price would be fixed.
It would go like that:
total = ( unit price of the main product for the current quantity + unit price of the option product for the current quantity ) * quantity
So if the unit price of the main product for the current quantity is $20 for 1 and $15 for 2, and the unit price of the option product for the current quantity is $25 no matter what, then :
- if the quantity of the product in the cart is 1, the total will be $20 + $25 = $45
- if the quantity of the product in the cart is 2, the total will be ($15 + $25)*2 = $80
From what I understand, that's what you said you want so you should be good to go with that main product + option product solution.