Magento Extra Fee extension adds two types of extra service fees to the order subtotal of an order. Magento comes with various additional costs like taxes and shipping expenses but apart from that this extension adds two more costs that can be collected by the store owner if he wants. One is insurance fee and the second is signature fee. The services are displayed in a drop down list on cart page of a buyer. Upon selection of any one of the services will add the corresponding cost to the subtotal of the cart.