Petco has Dr. Elsey's Precious Cat Ultra Scoopable Multi-Cat Litter for $10.49 or $9.99 with repeat delivery FS.
gives 20% off first repeat delivery making it $8
gives 15% off other orders making it $8.50
This is a great product that I have exclusively used for the past couple of years and I usually purchase it in the 13-16 dollar range.
Product link [petco.com]