why its more and less ?

- 8.29 The fixed and variable costs (in U.S. dollars) for the new recycling plant that Eldon Yi is opening in Australia are computed as follows: Range where Victoria is preferable/ 6 points): is more than 5,128 units Range where Perth is preferable/6 points): is less than 5,128 units For recycling 5000 units which one is preferable/6 points): For recycling of 5,000 units Perth is best