This feature is available on all Goodshuffle Pro Plans.
There are two ways you can potentially add additional fees when needing to add a fuel surcharge.
Flat Fee + Mileage
When setting up your Delivery Logistics, you can set a Flat Rate + any additional Mileage. This mileage rate is based on your Headquarters/Sales Office in your account settings.
If you have more than one Sales Office or Warehouse, you can change the location in the project (Article).
Additional Fee
If you have a fee you plan to charge in addition to your delivery rate, you may add a 'General Service' fee. Surcharges are generally set at either a flat fee or a percentage of the order.
It is also a good idea to include information about the surcharge in your Description or your Terms and Conditions.