Hi,
In-app purchases on Windows work differently than on iOS. You shouldn't be making in-app purchase entries for each folio in your Windows Store listing.
See Digital Publishing Suite Help | DPS publishing guide for Windows Store for complete details on how in-app purchasing is different on Windows, and how to set it up correctly in the store. Once you have your consumable in-app purchase entry created for your store listing you'll need to request an updated custom viewer that incorporates that Windows Store product ID, then resubmit the app to Windows for approval.
Neil