This can be done by clicking your the container that has super tables on your dashboard.
On the left side of the data tab. There is pane that says calculation. Click make a calculation on there.
Navigate to the box that contains Calculation. Depending on your screen size you may have to scroll down.
To access the if Else Formula Editor, Click on the If-Else Formula Editor.
In this case we will create a calculation that will display 0 if profit is lower than or equal to 0 but otherwise it will display the profit value.
Click save and Apply & Close.