I agree if the prices are now really higher. They don't "feel" higher to me. Here's cat litter that's $17.49 (one of the root comments mentioned this but it might not be the identical product):

https://camelcamelcamel.com/Dr-Elseys-Premium-Clumping-Litte...

Looks like the price has been going sideways for 4 years with some noise up and down, and before that, come down a lot?