I'm looking for a way to set up automated bundle pricing in Shopify POS. We just need to sell sets of 4 or 5 items at a fixed, discounted price- this could be done either by automatically discounting the cart after ringing up the products individually or by creating a new product listing for the set that would adjust inventory counts for each of its components accordingly when sold. We would probably have about 20 such sets available, and each of the components are also sold individually. I've looked into a few bundling apps, but it seems that they mostly are only designed for e-commerce. Has anyone found a (preferably free) app or workaround that could help with this?