Forget the Core: Can You Say 'Paper or Plastic'?

This article about Costco interested me because I am from a large family and my mother does her grocery shopping at Costco, so I identified with the buying in bulk, coming away with things you didn't intend to buy deal.

But I came across this:

"A typical full-time cashier will earn $40,000 a year plus benefits after four years with the company."

What? I'll barely make that with an Ivy League degree at the best employer possible on my current career path. They don't tell you that in the Columbia brochures.