Antinode Allowance
After sending our son away to college, he would often call up asking for money. One time when he called my husband answered, “sure we will send you money” he said, “and I also noticed that you left your Physics book here, should we send that also?” “Uh, oh yeah, OK,” he responded. I asked him afterward how much he sent. “$1,100″ he said. When I gave him a surprised look, he explained, “Don’t worry, I taped a $100 check on the cover, and the other $1000 check inside the cover!