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Lost my manual

How does the COST SELL Margin keys give me the margin? Thanks,

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Re: Lost my manual - Aurora Electronics HC212 Calculator Calculators


Posted on Jan 31, 2006

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I am trying to figure out how to use the Cost, Sell, and margin buttons on this calculator...any insight?

I haven't used a calculator with these functions, so let's do a test.

I'm guessing is it for doing basic accounting. The equation is Sales - Costs = Gross Profit and maybe Gross Profit / Sales = Gross Margin.

If we enter 100 in sell, 40 in cost, does the margin come out to be 60 or 0.6? If it comes out to 60, the margin is the Gross Profit. If it comes out to 0.6, then the margin is Gross Margin.

Good luck,


May 12, 2016 | Calculators

1 Answer

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

x= 3.125

Good luck.


Feb 12, 2015 | Calculators

1 Answer

I would like to know what the key above the margin key is for. Can you tell me?

It's used for time calculations. See Example 2 on the second page of the manual.

Jul 29, 2012 | Canon P23-DHV Calculator

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.

Nov 30, 2009 | Canon P23-DH Calculator

1 Answer

I have an EC-100 S Ibico Calculator. How do I use the GPM button to calculate margin?


For GPM on ibico EC-100 S:

Enter Price
Hit Minus Key
Enter Cost
Hit GPM Key to get GPM

Oct 07, 2009 | Ibico EC-100S Calculator

1 Answer


download the user manual (P23-DH III) from here:

Nov 01, 2008 | Canon P23-DH Calculator

2 Answers

Casio hs 8va Mark up key

Hold the % key till the set letters come up, then press TAX + , then type in your new rate then press the % key again to set the rate. hope this helps.

Jun 16, 2008 | Casio HS-8V Calculator

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 | Calculators

4 Answers

Determine Selling Price doesn't work

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.

Sep 25, 2006 | Office Depot KS-1000 Calculator

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