Plot hole: When Andy duels Dwight, it doesn't make much sense for the office employees to not be outside watching The Duel. On other occasions, like Pam hitting Michael, they did watch outside. To not have any one of the office workers watch or even supervise the situation, including Jim, who acts concerned throughout the unfolding ordeal, is unlikely. The reason everyone stays in is so Andy's plan of blindsiding Dwight with his car can work out.
Plot hole: When Jim's bank calls his office, Kevin is there and ends up pretending to be Jim. The Banker automatically assumes that he is not in Puerto Rico only from asking his address and social security number. It would have been very plausible for him to have forwarded the number to his cell phone, where the same scenario could conceivably occur (since The Banker refused to listen when Kevin tried to correct her).
Answer: In the 2007 episode "Ben Franklin" when Jim is talking to Pam there is a candy bar with a purple wrapper that says "Picar-" I assume picaroon, it's hard to see past Pam. I found this trying to investigate what that candy bar is lol.