Materials Inventory

Hi there, i just install the app at shopify and I have a question. I ready FAQ but I didn't find any email to contact for support, so I will place my question here. If I have 80 product in shopify inventory of a product A. This product needs raw material B and C to be made. I add these raw materials, B for example 40 items and C material 60 items. When I will press sync, shopify will have a total to 40 pieces of product A, or will have 80+40 = 120 pieces?
Thank you in advance and keep the good job