Sharp EL-531TGBBW 12-Digit Scientific/Engineering Calculator with Protective Hard Cover, Battery and Solar Hybrid Powered LCD Display, Great for Students and Professionals,Black and White : Amazon.ca: Office Products
Using the Sharp EL-531: Fractions and Exponents - YouTube
Scientific Calculator, 1 unit, EL531XTBWH – Sharp : Calculus and measurement | Jean Coutu
Combinations using your Sharp EL-531W calculator - YouTube