This site includes a free function library for Microsoft Excel designed to make business plans, budgets, structured financings and cashflows. You also have access to the sample Calculations, all built with Business Functions:
Loans,
Interest Rates,
Finance
Math and Stats
Budgeting
Dates,
Accounting,
Real Estate,
Real Estate (UK Specific),
Petroleum Economics
Calculation Reference
http://www.businessfunctions.com/index.php
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