This is a calculator which I have used like so long a time from School days if I come to think of it. Very Useful easy to calculate. It works sufficiently well and long lasting.
I use it to carry with me around as I m in sales works easily and the best part is even if the battery starts to go down it has a small solar pannel which helps to use it in the field.
It is light weight and I always carry it in my bag for sales. I would suggest anyone with non scientific calculation, Either shop Keepers, Sales men, Students, Anybody who needs to do calculations is usefull.