Thumb Score: +17

Amazon [amazon.com] has 1-Gallon Zep High Traffic Carpet Cleaner for $9.48. Shipping is free w/ Prime or on $35+.

Product Description from Amazon:Lifts food and dirt stains
Enzyme action eliminates odors
For high-traffic areas; revives matted, old and soiled patches
Removes deep, set-in stains
No need for dilution – Ready to use – Just spray and blot