What do the various shipping costs options relate to?

Store Commander includes multiple fields related to shipping costs. Here is an explanation.
 

 Delivery view

• Add. shipping cost: Value added to the price incl. tax of the product and the default carrier's shipping costs at the time of the order.

 CSV Export - Options

• Shipping fee: the value entered in this field is added to the price incl. tax of the product in the generated CSV file
• Free shipping fee from: the shipping cost (above) are not added if the price incl. tax is equal or more than the value entered in this field

 CSV Export - Mapping fields

• productshippingcost: automatic calculation using the products weight & the default carrier cost
• priceinctaxwithshipping: automatic calculation: price incl. tax + product shipping cost (= automatic calculation using the products weight & the default carrier cost