It happens every day.
A bloke runs out of munny in the pub and asks his mate to buy him one more beer.
"I will give you the munny tommora like". (Not Apey
.... he just takes another beer.
)
Next day "Here is the munny for the beer you bought me yesterday, Oh I will buy you a pint for sorting me out
"
Work out the APR on that transaction.... less than 24 hours and paying double.
Steve will be able to come up with the figures.