This financial calculator from the renowned Texas Instruments brand is an excellent tool. It has an easy-to-read, 10-digit display that shows current variable labels and values, stores up to 24 uneven cash flows with up to four-digit frequencies, and allows you to edit inputs to analyze the impact of changes in variables.
Features
Profitability calculations; cash flow function calculates NPV and IRR for uneven cash flows
Time-value-of-money and amortization keys solve problems including: pension calculations, loans, mortgages, etc.
List-based statistics basic functions allow addition and storing of data with 4 types of regression
4 different methods for calculation depreciation, remaining book value and remaining depreciable value