Title sum in the calculated column

[diegolima]

Hello guys, how are you? I need help, I have a table with 5 columns and the values in the columns I need sum for the showing in a bar graph:

However, when I place the column in the bar graph, the title of that column is calculated along with the values, all columns are calculated only the Meter column that is not the only column that does not add the title. I put the code to subtract one and thus remove the value of the title, but the look was not so good:

I need remove these values -1 this months that not have values, but I don’t know make to do. Can anybody help me?

Thank you all!

[amitchandak · Accepted solution]

@diegolima , put a visual level filter on the column >-1