Casio FX-991ES Plus Scientific Calculator Fx 991 Es - New & Sealed ship to world wide : Office Products - Amazon.com
Amazon.com: Casio Fx-82es Fx82es Plus Bk Display Scientific Calculations Calculator with 252 Functions : Office Products
Amazon.com : NEWYES Scientific Calculators with Writing Tablet, Upgraded 991MS Solar Energy LCD Science Calculator Notepad with 349 Function,Foldable Calculator for Students, School and College (991MS) : Office Products