retrieve counter

Hi all of you,

I am new to this forum and hope to learn a lot about Nintex from you.

For every item added to a sharepoint list, I want to calculate the last used counter using the formula counter=counter+1.    The result must be put in a separate column of the item (as call-number, ticketnumber).

Is this possible? I am using Nintex Forms 2013 and Nintex Workflow 2013.

Thanks in advance.