From here you can hire a new Mechanic. Each Mechanich have a precise set of skills and can take care of a specific maintenance type. Furthermore, they have a speed which means a decrease of 5% for each speed point in maintenance time
Price per KM represents the base reward including the market change. For each Cargo Trucky can predict with a good approximation how much a job based on its distance will pay considering all bonues. Other costs like fines, transports, tollgates, fuel, renting are not included.