A dowel pin is required to be inserted in a base. For this application H7 fit for hole and a p6 fit for the shaft are chosen. The tolerance quoted are \({}_0^{ + 30}\mu m\) for the hole and \({}_{ + 20}^{ + 40}\mu m\) for the shaft. The basic size of the lift is 60 mm. The maximum Interference between dowel pin and the hole (in μm) is ________