Average cost with distinctcount

// If you want the average actual cost
// per trip in a given country averaged 
///across different countries, then:


AVG Actual Cost =
AVERAGEX(
	DISTINCT( 'Actual Data'[Tax Country Departure] ),
	// This DIVIDE gives you the average cost of
	// a trip in the currently iterated
	// Country of Departure and the AVERAGEX
	// makes sure that you average these averages
	// over all visible countries of departure.
	DIVIDE( [ACT cost], [Trip Count] )
)