In Lake County it is (lowest company price or about 100 gallons) $297 and $347. SHOP AROUND. $2.15 in Chico (Tri Flame Propane) min 100 galons. $2.86 per gallon. The price changes weekly, sometimes even daily. And most definitely by company. In Tehama County it should be around $2.24 as of June 21, 2010. In Shasta County it should be around $2.34 as of June 21, 2010.
If possible, be selective in which cat you ate feeding, or you might end up as a cat hangout. If you already have house cats, they might not appreciate the social or territorial competition. For stray cats any brand of regular cat food works. Also if you ate fish recently the scraps from that meal would be fine. Stray cats don't eat on a consistent basis, so they really would be fine with anything. Water is also necessary.
The answer, of course, is yes, you should feed strays. Since cats became domesticated they are no longer wild animals that can fend for themselves outside. They don't survive very well outdoors on their own without human intervention. The best that stray cats can usually do is to eat from garbage cans. lot of people are reluctant to feed strays for several different reasons. One of these is the idea that strays will breed out of control if you feed them. The truth is that strays can breed out of control whether or not they are fed.