Activeadmin - Need to add two values and show it in third column

Question

I am trying to add the values and introduce a new column in Activeadmin, so that when I add the values it automatically sum up the values and show it in the next column.

Image for reference:

Answer 1

Take a title to a column add add the required columns to it.

index do
  selectable_column
  column "New Column" do |your_model_name|
    staff_salary.to_i + visa_&_medical.to_i
  end
end

Refer here.