data point issue ...line graph

Hello

I have a simple line graph but having some trouble trying to show "headcount" on the graph.

I have two sets of data (reported revenue) that Im showing, however, I would like to show the respective headcount .

when i select "show data labels, it shows me the values $ values, but i would like to replace that and show headcount that make up that revenue?

i have attached a sample, can someone pls help me with the obvious, thx you!