I am working to start a store to sell nuts and bolts. The plan is to inventory each individual bolt and then sell them in different packaged quantities i.e. 30, 60, 90. How can we use shopify variants or otherwise to adjust the inventory when an item is purchased?
Start with 1000 bolts and customer A buys a package of 90, inventory changes to 910; customer B purchases 2 packs of 60, inventory changes to 790 and so on and so forth?
To be honest, i would set aside a certain amount of each type of packages, and make them their own variants, and manage inventory by the amount of packages and not by total nuts or bolts. if one runs out before the others, repackage them accordingly. As you get more data on how they sell, you will learn a good proportional stock.