A cat does not cost much, everyday healthy cat 2 dollars a month is almost enough, only refers to the well-off type of cat, luxury does not count.
My family of 8 cats, I can not buy sources fluctuating, rely on the luck of wrestling with the real and fake imported cat food, I first of all to ensure that the food is sufficient, as you buy and have. I also do not like to challenge their intestines to go often change food taste. Love to eat, eat the body to adapt, healthy is the first. A 2kg bag of cat food can feed a cat for a month and costs about $12-13.
Cat litter is cheap, pine wood, bentonite clay, tofu sand a lot, the price is not expensive, 2 yuan a month enough. Eating and pooping is solved, the big head of daily expenses is finished, the remaining 5 dollars can be used to add flowers. If you buy a toy, you may not like to play with it, depending on your luck. If you buy a litter box, you may prefer a cardboard box, so let's see what happens. Canned snacks love it or not, try a few more.
On top of that, there's the once-in-a-lifetime de-sexing and annual vaccination.