How much will your baby cost from birth through college? A lot, of course, but just how much? A new website from Citibank and Johnson & Johnson helps you calculate the numbers based on specific questions, including whether you are a single parent, special factors such as multiple births and health issues, even whether mom is nursing or bottle feeding. Check out Baby Center, but only after the kids are asleep, so they don’t hear you screaming. Yeegads — a semester of pre-school today costs as much as a semester of college did yesterday. Maybe more.