Options only discount

-- url of the page with the problem -- : www.filkab.solar
-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.6.4
-- PHP version -- : 7.0.9

Hello,
Is there a way to add discount on specific products only when they are added as options to other products.
Example:
Product A, Product B -> when they are sold separately they have normal price.
Product A with option Product B -> Product A has a normal price but Product B has 5% discount.
Thanks.