Problem with product

-- HikaShop version -- : latest
-- Joomla version -- : 3.3.0
-- PHP version -- : 5.5.11
-- Browser(s) name and version -- : IE 11

I have a software product ($100) that can have optional software maintenance ($20). When i go to the product page in hikashop, it displays the product option (as listed under Options), but it's a separate line item in the cart (one line shows $100 and the other line shows the maintenance option in another line for $20).

How do I configure hikashop's prdoucts so the option shows up in one line?

That worked. Except how do I not have it listed as a product when I go to the Hikashop cart?