trivia alert -

The reason we have prices that end in "99" or something similar is a survivor of the early days of retail in the 19th century in Britain. Shopkeepers didn't trust their socially inferior employees with money, so made sure the customer needed to receive a little bit of change. This meant the employee had to take the money to the cashier to get it (tho maybe some kept a few coins in their pockets ...

the original small coin was a farthing (one quarter of a penny) but then prices were much lower back in the olden days.