Data in Excel

I have an Excel workbook filled with numbers pulled from different sources, and I need every column to behave like a true numeric field before I can rely on it for my monthly reports. Your job is to go... (Budget: ₹750 - ₹1250 INR, Jobs: Data Analysis, Data Cleansing, Data Entry, Data Management, Data Processing, Excel, Excel Macros, Excel VBA, Visual Basic, Visual Basic for Apps)