Aggregating Only Visible Values in DAX

Alberto Ferrari shows how you can calculate a sum based only on the visible values and ignoring the missing cases:

These measures produce the correct figures month by month. However, at the year level the number of working days might be too big whenever there are incomplete months – this always happens before the end of the year, or when the first month with sales is not January as in the following example. As you can see in the following figure, in this case the yearly value of SalesPerWorkingDays is lower than the value of any month, which does not make much sense.

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