I am using one form to calculate two values (emails and phones). There are two fields to calculate these number, 1- Sum of emails, 2- Sum of phones. If i'm calculating emails I need the Sum of phones to be blank not 0. Is there any way to achieve that. I tried an If formula, so if the type is Phone the value of the field to be "", but it's giving errors.

my formula:

If(

[X]="Phone calls","",

[Y]=-100,0,

[Z]=-100,0,

100-[N])

my formula:

If(

[X]="Phone calls","",

[Y]=-100,0,

[Z]=-100,0,

100-[N])