If the service provider updates their costing to you, you will be alerted when you go to Product app.
You would need to click HERE to see the change. Then, you would see the product info (product name, SKU name, sales model) and compare the new cost to your current selling price. After that, you can perform the necessary actions.
For example, you Update China - Toll-free, the next step is to set a new price and Save.
