Where I work, our Marlboro cigarettes, all styles, used to come to, after tax, $5.26. If I gave everyone who bought a pack using 6.00 in cash .75 change instead of $.74, my register would be short probably a quarter over one shift. Over a day, maybe a dollar. Over a month, $30 profit, down the shitter.
I’ll grant you, Staples was probably selling almost no single bottles of Wite-Out as a whole transaction, but pennies really do add up.
Joe