An optometrist was instructing a new employee on how to charge a customer.
"As you are fitting his glasses, if he asks how much they cost, you say '$75.'
If his eyes don't flutter, say, 'For the frames. The lenses will be $50.'
If his eyes still don't flutter, you add 'Each.'"
A forestry-service employee was recording the rainfall in his area. One drizzly day, his thoughts were apparently elsewhere as he typed "thirty three inches" instead of "thirty-three hundredths of an inch" into the computer.