Waterfall Chart measure with non numeric values

I want to create a Waterfall chart with a measure. 

My measure turns the 0 values in "Data N/A".  How can I filter those types of values in Waterfall chart? 

This is the table after applying this measure: 
Measure=
var a=CALCULATE('Table'[Value])
return
if( a=0, "Data N/A", calculate(sum('Table'[Value]))


Thanks!
Jihwan_Kim amitchandak Anonymous daxer-almighty