Replicate Complex Excel Spreadsheet

I have an existing Excel model that I need rebuilt from scratch so it behaves exactly the same as the original. Every data format, formula, calculation chain, and embedded chart must mirror the source workbook one-to-one because it will feed directly into my financial analysis work... (Budget: ₹1250 - ₹2500 INR, Jobs: Data Analysis, Data Entry, Data Processing, Excel, Excel Macros, Excel VBA, Financial Analysis, Visual Basic)