Expression does not need to show results when equal to zero

[#1]

I have a question about calculating in a dimension, I am using an excel spreadsheet as the data source and I want to count the number of 'Cont. Labor Cross Charge-In' and 'Cont. Labor Cross Charge-out', one is a positive number and the other a negative number, if adding both together balances out I do not want to display results in the chart. So far I can see a 1 in my chart when the numbers balance out to zero, so I think I need to add something to the end to say if equal or zero do not show me, only show when the numbers do not match.

Here is the expression:

count(if(

[DESCRIPTION] <> ''

and [DESCRIPTION] <> null()

and (

[DESCRIPTION] = 'Cont. Labor Cross Charge-In'

or [DESCRIPTION] = 'Cont. Labor Cross Charge-Out'

) // end and

,[ID]

) // end if

) // end end count

/ count(distinct if(

[DESCRIPTION] = 'Cont. Labor Cross Charge-In'

or [DESCRIPTION] = 'Cont. Labor Cross Charge-Out'

,[ID]

) // end if

) // end count

[#2]

I didn't re-type your expression but if you substitute exp_1 & exp_2 with your expressions you can use something like whats below

if(exp_1 - exp_2 <> 0, hours_diff)

[#3]

If you are using a chart just select "Surpress values when null"