@DaisyOaks I welcome you to check out our app, Sell Products by Weight: https://apps.shopify.com/sell-products-by-weight
We can handle everything you describe on the POS side and show the exact weight on the customer receipt as well. For deducting inventory, please send us an email after you install our app letting me know it’s you, and we’ll change our back-end for your store to deduct based on “each” instead of by pounds.
We also have a feature to keep your online and in-store inventory synced - you’ll receive a welcome email with a setup video after you install our app that outlines how to use this feature.
Best,
Derrick
Founder