Monthly Sales Data Entry

I have a stack of sales, invoices, and other financial records that must be transferred into Excel and polished so I can rely on the figures without second-guessing them later. Every record belongs in a single workbook, broken out into separate sheets for each month... (Budget: ₹12500 - ₹37500 INR, Jobs: Accounting, Data Entry, Data Management, Data Processing, Excel Macros, Financial Analysis, Visual Basic)