Formula Reference To Cell On Another Sheet

I have Excel 2007, here's what i want to do. I've got a workbook created with several worksheets in it. I want to input the name of a project in say, cell A1 on sheet1. Then on sheet2 cell C4, I want the text I input into the afore mentioned cell to show. I know how do do this with numbers (using the autosum button), but I can't figure out how to do it with text, though it's probably very simple & I'll be embarassed when I get an answer. Following is EXACTLY what I'm trying to do if the above example is confusing.

I have a Project Cost sheet and on it I input (text) a description of a building to be constructed. The cells next to it will be the associated costs of that particular building. There will be several buildings listed on the sheet. On a Sales Figures Sheet in the same workbook, I want to list those same buildings and then their corresponding sales prices. I want these descriptions to be automatically pulled from the costs sheet, so that I only have to input the sales figures.