Question about Office Depot KS-1000 Calculator

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Determine Selling Price doesn't work

I'm a salesperson that calculates cost + markup = selling price all the time. I bought this calculator because this function was included. The instructions on the back say to punch in 29.24 CST (under the SEL row) and then 20 MAR (for the 20% margin or markup), which the box says should equal $36.55. HOWEVER: Cost: 29.24 Margin / markup: 20% = 5.848 Sell: 29.24 + 5.848 = 35.088 What gives? Obviously something is programmed wrong or the instructions are somehow wrong.

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  • Anonymous Mar 25, 2014

    this is a top up on a rough training on how to cost for your time and price your product the right way for crafters/artisans



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The computer is not broken and is correct saying what the sales price is. If you work backwards from selling price and take 20% off, then you get 29.24. The program is a generally accepted accounting principle (GAAP) that has markup not from cost, but from retail. You have been doing it wrong all these years and have been giving your customers a better deal. Play with the numbers and you will see what I mean.

Posted on Oct 26, 2006


What is93.75/6.25

Posted on Dec 20, 2007

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A 20% "markup" is actually an increase of 25%. Clubned is correct, you are not adding 20% to your cost. A 20% markup treats your cost as a 20% reduction from your marked up price. 25% of 29.24 is 7.31 29.24 + 7.31 is 36.55 20% of 36.55 is 7.31 The calculator and instructions are correct. It's doing a financial calculation.

Posted on Feb 08, 2007

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BethLeg, I believe 29.24 + 5.848 is really 35.088. There is a mistake on the box!

Posted on Oct 02, 2006

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If the unit selling price is $2.50 and the unit cost is $1.00, what action is needed to maintain the gross margin percentage when unit cost increases .25


Let's set up a table to see it (sorry, I'm a visual learner;)

Selling Price $2.50 x
Unit Cost $1.00 $1.25
Gross Profit $1.50 x - 1.25

Gross Margin 60% 60%

Time for some algebra;)

x - 1.25 0.6
---------- = -------
x 1

Now we can cross-multiply or multiply both sides by x to get rid of the fraction.

x - 1.25 = 0.6 x

Subtract 0.6x from both sides and add 1.25 to both sides to get the variables on one side and the constants on the other.

x - 0.6 x = 1.25
0.4x = 1.25

Divide both sides by 0.4 to get x by itself.

x= 1.25

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Good luck.


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1 Answer

I must not understand what a margin is so could someone explain, the instructions give this example: If I purchase something for $2000 and want to make a 20% profit I would need to sell it for $2500 (2000...

I think you should refer to you definitions. The 20% is called the markup. The profit margin is calculated with respect to the revenue. So you should divide the 400$ by 2400$ to get a net profit margin of 400/2400 =0.1667 or 16.67% (And we are not taking into account the taxes).

Margin = Markup /(price + Markup)
Markup = Margin* (Price +Markup)
Markup = Margin*Markup + Margin* Price
Markup*(1-Margin) =Margin*Price
Markup = Margin*Price/( 1-Margin)
For Price =2000, Margin =0.2 (that is 20%)
Markup = 0.2*2000(1-0.8) =0.2*2000/0.8
Markup = 2000*(0.2/0.8)= 2000*0.25 = 500

Thus to have a (net) profit margin of 20%, an item costing 2000$ must be marked up by 500$.

Try not to reason with numbers. Write the defining relation and use algebra to isolate for the variable you seek.

Hope it helps.
Thank you for using Fixya and for rating this solution.

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Apr 22, 2008 | Office Equipment & Supplies

1 Answer

Instructions on How To Use a Calculator

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

Oct 18, 2007 | Office Equipment & Supplies

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