Summation based benchmark for calculators

[pier4r]

Added many thanks!

I got from ebay, since they are plentiful and cheap (see n1) 9860g and 9860gII , then I will see if I can replicate the reported results.
Also for possible future searches. Both can be kept alive via USB like the 50g. The USB cable is the same of the 50g (and ti89): mini B. Of course the 50g wins easily in terms of long term storage (sd card) that can be recovered even if the main system goes awry.

n1: http://www.hpmuseum.org/forum/thread-970...l#pid88145 - I do not remember where I wrote that I wonder how many functioning devices are trashed after the owner does not like them again instead of ending on ebay.