Thanks for the reply @Opus 17. I do think it's supposed to be taxable income because as I said, it's because I worked 2 extra hours one day, they just coded it as a box rental so no taxes were taken out initially. (Though, tbh, I was surprised they paid me for a full day on the Wednesday because it was a half day.)
I'm not sure if there was an accountable plan. I didn't have to do any reporting on the receiving of the $50. I'm also not sure if it's a "working condition fringe benefit" because it's my personal computer. Not all of my uses of the computer are for work.
