CSOFX300MS - Casio FX-300MS Scientific Calculator Go to amazon.com Related posts 12 best calculator casio fx-300ms for 2022 Feature+/- Switch Key - YesAmortization - NoBackspace Key - YesBase Number Calculations - NoBond Calculations - No DescriptionModel FX-300MS Scientific Calculator - 10-Digit x Two-Line Display, LCD(sold in packs of 3)