Congrats to April who correctly answered the last riddle of the day.
Onto today's riddle of the day.

Many shops have prices set just under a round figure, e.g. $9.99 instead of $10.00 or $99.95 instead of $100.00 . It is assumed that this is done because the price seems lower to the consumer. But this is not the reason the practice started. What was the original reason for this pricing method?

I know its a day late but the answer is so that cashiers would have to open the register, thus recording the sale and causing the cashier to be unable to steal