Please help me with business attire!?

Try the affordable stores first, like Wal-mart, K-mart and Target. You could even try the mall, places like Macy's usually has there discount rack with beautiful things at a low price. If not raid family and friends closets. Try to aim for black slacks or a knee length skirt in black. Black is a very basic, beautiful and clic color, and everything goes with black. You say you have one suit, what you can do and I have done before is if that suit has a top, that's one outfit, the following day you can wear just the pant part and purchase a blouse that matches and wear it with out wearing the top part of the suit and now you have created another completely different outfit. Don't forget accessories are very important and if you already have them, even better. Try snazzing up your outfit with a watch, maybe a bracelet, small studd earrings (trying avoiding things that dangle) and a purse that matches. Try not to wear shoes that are too strappy or stilettos, a small heel would do. Plus your hair also adds to the look, try a bun which is always professional looking or let it loose and straighten it out. Good Luck and have a safe trip.