When the naive young lady asked the clerk in Le Sex Shoppe to show her his
selection of vibrators, he brought out the two most popular ones.
"The basic white plastic one here is twenty dollars," the clerk said.
"The flesh-toned rubber models are thirty."
"I'm just not sure," the woman said, Then she noticed an eye-catching
item on the back shelf. "How much is that plaid one over there?
"Uh, well, that's a pretty special one," said the clerk. "I couldn't
sell you that one for less than a hundred."
"I'll take it."
Later that day, the store owner checked in to see how business was
going. "Great," the clerk told him. "This morning, I sold four white
vibrators and three flesh-toned ones. And, this afternoon, I got a hundred
bucks for my Thermos."