Hi jarhead, I'm not sure exactly what they mean by a "pink/yellow commercial bank receipt" either. I'm going to guess that they are using "commercial" in a generic sense, i.e. any bank. But it's best to call the US Embassy and ask. Just request the Consular section. Or try www.state.gov and look under Qatar. Alternatively you could call your bank and see if they know what is meant by a pink or yellow receipt. Good luck, what school are you going to?
Mandi