Hi there! Sean from the Shopventory.com team.
Without having a larger conversation about what you’re working on and the problems you’re running into, I think Shopventory may be a good “app” addition to your Shopify store.
You made a comment about cost management: Shopventory tracks COGS on a lot-by-lot basis. If you receive a batch of product at $5/unit but the previous batch was $6/unit, Shopventory will retain the $6 cost and dynamically switch to the $5 cost when the first batch has sold through, following FIFO (you can switch to LIFO or even use Average COGS).
Again, lots more to dig into but I hope this helps! Shopventory has a 30 day free trial if you want to take a look and feel free to email sales@shopventory.com if you have more questions or want to jump on the phone 