I want to realize the sales of service package, this package has different prices. I choose "external" option, set items and prices.The user only can buy a kind of prices, if he add a different price of the package into the cart again, and cover it.
I think the solution is it: Set up a custom field which is used to mark,make a judgment before making a purchase, and then delete the same "$product_id", different "$variation_id". but I can not find function how to delete product in different "$varation_id". Ask for advice.
Sorry,I use a translator to translate it.