Back in the days of paying cash for everything, it was both rare and amazing when a transaction came out even in terms of standard dollar bills. If you pumped $

Back in the days of paying cash for everything, it was both rare and amazing when a transaction came out even in terms of standard dollar bills. If you pumped $20.37, you'd have to pay the clerk $21 or $25 and get $0.63 or $4.63 in change back. Coins were annoying to deal with. At the gas pump, you could control how much you spent precisely. So many folks would slow down their pumps as they approached $10 or $20 or whatever amount they needed and then stop on the even number. In the commercial, pay-at-the-pump is a new and novel feature, so Jerry can fill his tank up to the top without worrying about dealing with the nickels and dimes.