The manager of Auto Shoppe is concerned about this purchase and has stated that if they were to buy the new engine computer code reader, "the machine has to pay for itself by the time we use it to read the codes of $500$ car engines." The manager says this is because "those sorts of engine computer code readers go out of date very quickly, so if we don't get our money back soon, we will probably just wind up replacing the machine before it ever breaks even." What would Auto Shoppe need to change for the service of reading each car engine to breakeven when it reads the codes from $500$ code engines?