Hi,
You can do it both ways:
- If you select a normal product as an option, you'll only have the choices no and yes for the option dropdown. However, if you select a product with variants, each variant will be a choice of the option dropdown. That way, you can have 3 choices, or more.
- If you use custom item fields, and you want the price of the product to change based on the custom item field selection, you can use the price calculations plugin here:
www.hikashop.com/marketplace/product/148...ce-calculations.html
With it, you can configure formulas which take into account the selection made by the customer in custom item fields among other things.