Sharp calculator EL-531WHB 2 line scientific calculator
This is an approved scientific 2 line calculator often seen for over twice the price.
seen in the Target "back 2 school" catalogue
http://target.dynamiccatalogue.com.au/portal/dynamiccatalogu…
This one does exactly the same thing: http://www.aldi.com.au/au/html/offers/2827_20425.htm