If you have a product variant with more than one SKU or more than one cost price, you can add alternate SKUs to track them.
First, navigate to the product's edit page.
1. Click the add button next to the variant that has alternate SKUs.
2. Enter the SKU, quantity, cost price and retail price for the alternate SKU.
– If needed, drag the arrow next to the alternate SKU to change its order. In the point of sale, the SKUs will appear in the order listed here.
3. Click Save Changes when you finish adding SKUs.