Money may grow on trees

By Fernando Arnaboldi

Sometimes when buying something that costs $0.99 USD (99
cents) or $1.01 USD (one dollar and one cent), you may pay an even dollar. Either
you or the cashier may not care about the remaining penny, and so one of you
takes a small loss or profit.

Rounding at the cash register is a common practice, just as
it is in programming languages when dealing with very small or