My parents have been working on this family business for more than a decade now. I serve as the financial partner to them and we are selling different items: eggs, dried and smoked fish, styro materials, groceries and more. When it comes to computation, my mother can deal with it perfectly and fast. But because we do have helpers and because we are selling vast of items we preferred to give our helpers calculators for ease of computation. I bought this Tri Scope mini calculator for our helpers. It is kind of handy and it has a blue neck string so they can carry it with more ease. It is a battery operated palm size calculator and contains the four basic Math operations plus it does have memory too. The numbers and operations buttons can be easily pressed. The numbers are readable on its display screen and the simplicity of this calculator matches our preferences. We are not after a scientific calculator because we are just after for an exact computation for what our buyers are buying and this calculator perfectly do the job. Simple, precise and handy it is.