Estimates X bitcoins with X GHash/s with ASICs?

[bdangles]

TL/DR: Like how many bitcoins, in a day, could i get with BFL's Jalapeno (4.5 Ghash/s)? (use speculation)

I'm fairly new to this bitcoin biz but its very interesting and fun. I'm 16 and just want to make some bucks for sitting on my ass lol. I'd be happy with making $50 a month either solo or pooling. So what do you think?

Also can you show some work/speculation so I can calculate on my own?

[eyci]

I don't mine myself but there are some mining profitability calculators on the net, e.g.

http://www.bitcoinx.com/profit/