Demo: https://codecanyon.net/item/advanced-cash-on-delivery-with-fee-surcharge/20117466
Essential plugin! This plugin allows you to add the “cash on delivery” payment method with the option of applying an extra fee.
This plugin will increase your sales! You can offset the extra cost of this shipping method by charging a fee to the customer. The cash on delivery payment method allows your customers to pay for the order at the time of receiving their order, they pay on shipment.The cash on delivery payment method is a customer favorite, since they don’t have to make a payment until they receive their shipment, which gives them security and confidence.
You can define multiple fee configurations based in multiple conditions
Also, you can use this plugin to add a cash on pick up payment method!