Magento Add Ramdom Fee or Discount to order Totals.
In a typical order, the order totals usually comprises of Sub Total, Shipping Cost, Taxes, Discount, based on these values the total order grand total is calculated.
This module adds a new line to order Totals. You can add an additional Payment Fee which will affect the order grand total.
This extension based on Payment Fee module (https://github.com/devromans/payment-fee.git)
Questions in magento.stackexchange.com (http://magento.stackexchange.com/questions/144552/magento-1-9-add-random-fee-to-order-totals)
Magento 1.9.x
Extension Configuration
Checkout Totals
