YITH Point of Sale for WooCommerce allows turning your WooCommerce installation into an easy-to-use and powerful cash register for each type of store or business.
Thanks to the integration between the two plugins, the cost of goods will also be assigned to orders generated via POS.
Once plugins are activated and the cost of goods assigned to products, they will be retrieved and shown in the order detail.
Set the cost of good on product

Cost of goods added to the order

The order items will show in the Sales report of YITH Cost of Goods.

For further details about YITH POS settings, please refer to the official documentation.