No stars, product return to Amazon and a different one (Sharp) ordered.
10 September 2015
Summary: Item has been returned and a new adding machine was ordered and received today. Could not get the Canon to function correctly. When I would hit the minus key, it would print in red but add to the total.
Summary: It works which is more than I can say for others I tried. One odd feature is this: if you enter 3 minus 2 it is the 3, the number ABOVE the subtraction that prints in red. This is confusing when looking back at a list of numbers.