You can set your product cost while adding the product. To add your product costs to an existing product, you should click the arrow sign next to product name. Then you will see the option to edit the product. If you are adding your products via batch import, you can use the column for product cost to import them with costs. It is also possible to update products costs via batch import for "adding new competitor URLs to existing products" option.

• Add your costs in the currency of your panel.
• Use only numbers.
• You can update the cost manually or with batch import anytime you want.

The video below shows the details of these processes in an example account.