Sorry for the confusion. I have removed the other text boxes and kept the ones that needed, i.e. on the charts.
The requirement is to exclude nulls and allow current selections. (Both, In the chart and in the Text box below)
In the text box(in bold, below the chart) I need to show the difference between two state s1 & s2 selections. At the same I want to remove nulls in the calculations and allow the current selections on the fields like Priority.
In the chart, I need to remove the nulls and allow the current selections.