Master measure expression is not working

[abc_18]

Hi,

I have to write a master measure expression like below:-

( Contract End Date - (Period End Date + 1 Day) ) / 30.41667 

but it's just giving me blank value, and if I use sum then I am getting some number.

sum(Contract End Date - (Period End Date + 1 Day) ) / 30.41667 

User wants expression like ( Contract End Date - (Period End Date + 1 Day) ) / 30.41667 

without sum, so If someone wants to make AVG they can sum and make count on their own:

Is it possible?

[choubeji]

When not to average function instead