It should take around 5 hours max to do a 50hr on an R44. Some would say less. In the Heli servicing world they seem to quote "fixed prices" but these don't relate to the actual time spent working on the machine. ie 5 hours! I suspect that when these were introduced whenever it was, that tehy perhaps included repairing other things that were seen at the time, obviously up to a point, like perhaps replacing a bulb or tightening a belt, but now all these things are over and above the fixed price. Just seems a bit mad really!