Calculadora Inteligente 

Calculator with tape. Calculate rule of three, interest rate, dates and times, etc. It has several financial features, but it can also act like a standard calculator with options to save in file or print all calculations.
calculator interest rate capitalized installment amount save print calculations dates times hours

Americalculator 

Calculator with a scrollable tape, options to save or print all calculations, optional large screen display. Calculates dates and times, capitalized interest, rule of three, capitalized amounts. Has 128 different synthesized sounds.
calculator interest rate capitalized installment amount save print calculations dates times hours