Set analysis with Missing Values

[#1]

Hi,

i have this situation :

CD_CODE	Prezzo2014	Prezzo 2015	Qty 2015	Prezzo x Qty 2015	Coverage
S0440871	-	13,64	-12	-164	-€ 164
S0302446	-	8,76	7	61	€ 35

When Prezzo2014 is equal to '-' , I want that Coverage is equal to zero.

How can i do?

I tried with Isnull Function or Len function but doesn't work.

Thanks a lot

[#2]

I tried with your expression but there is a problem. I have a drill down group in my linear table and when click on the row to drill total result change.  What is it the problem?