Shopify Inventory: Stock, Days of Stock, Cost per Item
The New Black AI reads a Shopify fashion brand's inventory on the Store page: for every product, the stock left, how many days it lasts at the pace of the last thirty days of sales, the units sold over those thirty days, and two numbers you can type here and that are written straight to Shopify: the stock itself and the cost per item.
Updated 2 October 2026
- 1Open Store › Products › Inventory
- 2Read the days of stock
- 3Type the cost per item
- 4Change the stock
How it works
Open Store › Products › Inventory
One line per product: stock, days of stock, units sold in thirty days, cost per item. A store installed before this version sees an Enable button first, to grant the inventory scopes.
Read the days of stock
Stock divided by the daily pace of the last thirty days. A product that has not sold shows no figure rather than a false one.
Type the cost per item
The field is Shopify's own unit cost, the one its margin reports use. Type it on the product line and it goes to every variant; a product whose variants carry different costs opens on its variants.
Change the stock
Type the new stock on the product line, or on each variant: it is saved to Shopify at once, the same quantity your storefront and your other channels read.
Why it matters
Shopify has a Days of inventory remaining report, and most stores never fill the cost per item, so their margin reports stay empty. Here the cost is an always-visible input next to the stock, and it feeds the Profit & loss of the same Store page.
The Store page is where it lives.
Frequently asked questions
Which sales define the pace?+
The units sold on the last thirty days, read from your Shopify orders.
Where is the cost saved?+
On the Shopify inventory item of each variant, so your Shopify reports read it too.
Do I need a Shopify store?+
Yes for this view: it reads and writes your Shopify products. Newsletter & social and the Analytics work without one.
Can I change my Shopify stock from here?+
Yes. Type the stock of a product or of each variant in the Inventory view; it is saved to Shopify at once.
Is the stock updated everywhere?+
Yes. It is your Shopify inventory quantity, the one your storefront and your sales channels read.
Which plan do I need to change stock or costs?+
Reading the Inventory view is open to everyone who connects a store; changing stock and costs from the Store comes with the Pro plan.
Is the pace the same as Shopify's report?+
Shopify averages over 28 days; this view uses the last thirty days of orders.
Does typing a cost change my prices?+
No. The cost per item is a private field of the inventory item; nothing on the storefront changes.
Can an AI agent read it?+
Yes. The agents you hire on the platform have the same reading and the same cost field.
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