<span>August uses this simile after his mother comments on how pretty Summer is..... his reaction shows his humility. She's the beauty.... he's the beast. This comment is meant to be humorous.</span>
If the price of Sprite increases, the demand for a substitute good like 7-up will increase too, because people will seek for a substitute product to replace Sprite.
<u>Law of demand</u> explains the higher the price of a good, the less people will demand it (or avoid it), and will seek others to replace it.