Using metaobject link to a subscription app

I had someome set up a multi-page quiz for my shopify using metaobject. At the end, it will ask my customer to select a subscription plan. The plan is using a subscription app’s selling plan id as the input value for the definition (shown in attached screenshot). But when i test the product, and get to the checkout page choosing my 6 and 12 month plan. The money amount is still the same with my monthly amount. Can someone help with that problem? Also, i need a redesign of the quiz pages.