Order Total: Shipping
Via "Configuration" > "Finance" > "Order Total" you can set up free shipping.
In the field "Sort Order" you define in which sort order shipping shall be listed in the order totals. It is important to remember that the sort order not only effects the way the order totals are displayed but also the way the totals are calculated. This is very important for modules that calculate totals like charges, discounts, etc.
Under "Allow Free Shipping" you can choose if you want to offer free shipping if an order weighs less than the weight and costs more than the amount that you enter into the two next fields.
In our example in the picture above, all orders, irrespective of the price, which weigh less than half a kilo get free shipping. If you only want to offer free shipping for orders over 100 Euro you enter "100" instead of "0" into the field "Free Shipping For Orders Over".
At last you choose whether the settings you have made for free shipping shall apply for national or international customers or both.