Group values, rename and calculate the difference.

[pri_GIS]

How can I group values and compute the difference (Max-Min) in each group. I am not sure if I can use summarize tool as group names are same. Please refer to the attached example.  

[binuacs · Accepted solution]

@pri_GIS One way of doing this

[pri_GIS]

Thank you @binuacs . This is awesome!