Victor V12 Financial Calculator V12 Financial calculator works in both RPN and algebraic formula model. Calculator features more than 128 built-in functions with programmable option RPN and is programmable up to 400 steps. Calculate loan payments, interest rates and conversions, standard deviation, percent, TVM, NPV, IRR, cash flows and bonds. Extra large 10-digit angled display and raised platform are designed for ergonomic use and easier reading. Design also features a sleek black and silver case with soft touch keys. 1 lb. calculator operates on two AAA batteries and includes a carrying case.