# Update an inventory unit cost

Update the unit cost stored on an inventory item after verifying the material and its unit. Reviewing the existing and proposed values helps prevent entering a price per pack as though it were a price per individual piece.

Help me update an inventory item's unit cost. Ask for the material code and new cost, confirm the recorded unit and current cost, and prepare the change for my approval. Keep any historical receipt costs separate from the item cost being edited.

[Try this prompt](https://app.millbase.ca/try-prompt?prompt=Help+me+update+an+inventory+item%27s+unit+cost.+Ask+for+the+material+code+and+new+cost%2C+confirm+the+recorded+unit+and+current+cost%2C+and+prepare+the+change+for+my+approval.+Keep+any+historical+receipt+costs+separate+from+the+item+cost+being+edited.)

## When to use it

An item's saved cost needs correcting or updating. Use the receipt workflow when recording a new delivery with its own quantity and cost.

## What you need

The exact material code, a confirmed non-negative unit cost, the item's unit, and permission to update inventory.

## What you’ll get

- The inventory item, its configured unit, and the current and proposed unit costs.

- An approval action limited to the requested item-cost change.

## How to use it

Open the prompt in Millbase, sign up or sign in if needed, then review the editable draft before sending.

Check how a supplier price converts to the inventory unit before approving. An item-cost edit should not be presented as a rewrite of historical receipt lots or previously recorded project costs.