In what Episode did both Andy and Barney leave a quarter tip at the diner? When Barney dicovered that Andy also left a tip he wanted to go back put his hat down and retreive his quarter. Andy said, No, Olive was a widow with four children. What is the Episode?

Earnest T joinst the Army, or A uniform for Ernest T. Don't remember the correct title, but its that episode.

That is correct. A very funny episode.