Canon introduces another palm printing calculator - The Ei-5100. This new models is not only stylish with its silver metallic design, but continues to offer advanced calculations right in the palm of your hand. Profit margin calculation can be calculated with the touch of a few keys. Tax rate can be stored and recalled whenever needed. And finally, the Ei-5100 has a built-in battery indicator to let you know when it''s time to change the batteries. Once again, this calculator may be small, but it''s big on getting the job done.