Excel Numerical Data Entry Needed

I have several existing Excel sheets filled with numerical data that now need to be entered into one clean, consolidated Excel workbook. Accuracy is everything here: every figure must match the source exactly, cell by cell, with no formatting drift or accidental rounding... (Budget: $2 - $8 USD, Jobs: Data Analysis, Data Cleansing, Data Entry, Data Integration, Data Management, Data Processing, Excel, Visual Basic)