Difference in value between bars in combo chart

[udaya_kumar]

Hi,

I have combo chart which has data by month and ID.

Please check the screenshot below

The bar is the actual data shown and what i expected is written in red text in paint.

If you consider the first set of bars, the values are 10,24,30,40,50.

I want the difference in values between them like 24-10=14, 30-24=6, 40-30=10, 50-40=10.

Either the values should be shown like in the screenshot or as a line in the combo chart with values.

[#2]

maybe

colunmn(2) - column(1)

and show values in floor of chart