What do you usually charge?

Hey guys. I’ve been working in web development for a few years now and have just started working for myself as a freelancer. I just had an offer come in for some small Flash work for an existing website. Basically 3 animated advert banners that run about 10 seconds each.

My problem is I have no idea how much to quote them. I’ve done this type of work before but for companies I was working for. I know there are many experienced freelancers here so I’m seeking your advice. Thanks :nerd: