Gee, I wonder why on earth you might suddenly want one right now? loo
I'm sure there will be other "calculators" that will work for you in the coming days
now since having the dingoo and calc, figured wanted to try both just for kicks so could say 'yeah that works' anyway want to now sell the calc, as new, fresh batteries, usb cable and has extra app installed, $75 shipped OBO, if no takers ill just hold on for a year till next son needs it