I need your help in solving one of my issue related to adding extra/custom price on subtotal on cart page. I have called a observer for checkout_cart_product_add_after and sales_convert_quote_item_to_order_item event and in which I am trying to add dynamic price from below code
This is allow me add in unit Price but I want to add in Subtotal of product. Also I have to tried to add price via custom options but it adds in Additional_optional field and not stored in info_buyrequest so might it not reflect to the subtotal price.
Please advise for suggestion.