On the Shipping costs tab, you can define shipping costs for the given shipping option. There are two types of shipping:
1) Flat shipping
No shipping cost is defined. The same cost is charged for all shipping for the given shipping option, as defined in the Shipping option charge property on the General tab.
2) Shipping based on weight
Shipping cost is defined and the cost is charged for the particular weight range. Please note that the cost of the lowest weight range is defined in the Shipping option charge property on the General tab.
You can add a new shipping cost by clicking the New shipping cost link and you can also Edit () and Delete () the existing shipping costs.