Example Service 1: set duration in days and with hourly rate. 2 10 Example Service 2: variable duration with min/max parameters and with hourly rate. 3 4 10 Example Service 3: set duration in days with CUSTOM (non-computed) set fee. 5 500 Example Service 4: set duration in hours with CUSTOM (non-computed) variable fee (min/max). 4 100 200 Example Service 5: set duration in days with CUSTOM (non-computed) estimated fee. 4 1000 Example Service 6: optional service 1 2 50 Example Extra Cost 1: set fee 1000 Example Extra Cost 2: variable min/max fee 1000 1200 Example Extra Cost 3: estimated fee 600 Example Extra Cost 4: with duration 6 600