My second job is only 7 days per month.
*I do this one all the time*
I'll go into longs, rite aid, McDonalds ect... when it's bussy and buy some ports or a burger and give them a $10 and when they give me back the change I wait for a minute until the mind is on the next costomer and say "hey I gave you a $20 - $50 ect..." Usually they just do the math and give you the change back because they dont want to hold up the line.
