Dorothy Gambrell, creator of the webcomic Cat and Girl, tracks her income via some nicely designed bar graphs that make interesting reading for anyone curious about the webcomics model. The graphs show not only how much she makes but what she makes it on as well as big expenditures (trip to MoCCA, printing books). In one way, Gambrell is living the stereotype: Her biggest source of income in most months is T-shirt sales, although she sold a lot of books in August. Freelance work also gives her a boost. The bottom line: So far this year, she has taken in $10,087.56 from her comic, a respectable second income but not enough to live on. And that isn't her net—she has yet to deduct taxes, PayPal fees, and other expenses. One encouraging sign is that the overall trend is up; she had a dip in July, but August was her best month yet. Sean Kleefeld analyzed the numbers a bit and figures she'll end the year with a gross income of about $20,000.