HP HP10bII+ Calculatrice financi&egrave;re HP 10BII+ Financial Calculator. The HP 10bII+ is the smart choice for business and finance needs. You'll be able to work quicker and more efficiently with over 100 time-saving, easily-accessible Easily calculate loan payments, interest rates and conversions, standard deviation, percent, TVM, With so many useful features, and an affordable price, the HP 10bII adds up to a wise investment.