I use a calculator at work sometimes. Say I'm on the phone with a customer, looking up a part for their lawnmower, and I need to apply markup on the dealer pri

I use a calculator at work sometimes. Say I'm on the phone with a customer, looking up a part for their lawnmower, and I need to apply markup on the dealer price I see on the screen. It's quicker for me to one handed type on the large physical calculator that's stored right beside the computer than to open a calculator on the computer and the computer one might even cover up the numbers I need to see on the screen.