Calculation average rate with 0 values

[6LastNon0Entries Avg] =
var __non0EntriesCount = 6
var __currentDay = max( Calendar[Date] )
var __daysWithNonZeros =
	filter(
		all( 'Calendar'[Date] ),
		'Calendar'[Date] <= __currentDay
		&& [Total Hours] > 0
	)
var __6DaysWithNonZeros =
	topn(__non0EntriesCount,
		__daysWithNonZeros,
		'Calendar'[Date],
		desc
	)
var __sum =
	calculate(
		[Total Hours],
		__6DaysWithNonZeros
	)
var __avg =
	divide( __sum, __non0EntriesCount )
var __6DaysWithNonZerosCount =
	countrows( __6DaysWithNonZeros )
var __shouldCalc =
	__6DaysWithNonZerosCount = __non0EntriesCount
return
	if( __shouldCalc, __avg )

Best

D