Question about Office Equipment & Supplies

# Instructions on How To Use a Calculator

I just bought a \$20 Staples Desktop Calculator - 12 digit display, item #466497. Much to my surprise it doesnt include instructions on its use. Of course, I can do simply mathematics, which is about 30% of its functions, but the rest of it is a mystery. I would need lessons to practice; such as, how to use M+, M-, MRC, Cost, Tax, Sell, MGN, Rate buttons which I dont have a clue about. Where can I get a booklet on its use? The salesman said they dont provide it, when I went back to inquire at the store.

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• Anonymous Nov 14, 2007

I don't know how to use the "Rate" key

• Anonymous Mar 03, 2008

need instruction sheet for the EL-480s

• Anonymous Apr 30, 2008

i am in the finance dept of a car dealership and I have completely lost all my learning of how to use a caculator, especially one with all the fuctions, I need some learning on how to do percentages on the calculator such as what is 12.9 percent of 16975.

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### Anonymous

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Ok I looked for ages for how these keys work and once you knwo how it is quite simple.

say something costs 100, enter 100 then press the cost button
say you want a margin of 25% then enter 25% and press the mgn button the result is the selling price 133.33

So to reverse it enter 133.33 press the sell button
Enter 25% and press the mgn button
result is 99.99 cost price (100) bar a cent/penny

and finally to work out margin

enter 100 press cost button
enter 133.33 press sell button
result is 24.99 which is the percentage margin

Simple isn't it

Posted on Aug 12, 2010

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