First access the Costs tab within the booking.
To define the variable costs, click on the calculator icon at the bottom right, in the Variable Costs field.
In the window, configure the Hourly Cost for the driver and a Unit Cost per km for all types of vehicle you want.
Click on the + to add a typology or on the trash can to delete it, and on the save icon when you’re done.
Keep in mind that variable costs configured for a booking remain available also for all others.
Click on Apply to update the Variable Costs for the booking.
The system will automatically choose the unit cost per km based on the Vehicle Type entered for the booking.