What do the MC, M+, M-, MU and MRC buttons on calculators do?

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M+ = Add to memory

M- = Subtract from memory

MC = Memory Clear (clear stored value)

MRC = Memory Re-Call (recall stored value)

MU = Mark Up



It calculates a mark up or needed to create a selling price based on a percentage and the purchase cost.

So if you want sell a product bought for $100 with a 20% mark up you can use the mark up button.

Entering 100 MU 20 % will give an answer of 25.

Of that $125 sale price 80% is purchase price of $100, and 20% is mark up or profit margin of $25

Note that this is not the same as adding a mark up of 20% of the purchase price (20% or $20) which would give a total of $120.

The difference is clearer if you want a 50% mark up. On an item of costing $100 then the mark up is another $100, making a sale price of $200. 50% of that sale price is the mark up.

If you took only 50% of the purchase price ($50) and sold it for $150, then the profit margin or mark up is only 33%.



Features:

* Grand Total (GT)
* CHECK - for viewing previous operations performed
* CORRECT - for deleting numbers
* M+ , M- , MRC - Memory operations
* Mark Up (MU)

How to calculate GT?

Whenever you press = the result of the current operation will get stored in the memory and subsequent results will be added to the previous results and when you press GT a final total of all these results will be combined and shown as result.
Example:
10 + 10 = 20 , 20 + 20 = 40 , 30 + 30 = 60
Now press GT
Answer: 120

How to use CHECK?

Perform the sequence of operations you want; and then start pressing CHECK to start viewing operations performed from 1st to last.

How to use CORRECT?
CORRECT will delete one number at a time.
If you want to clear the entire screen press CE or AC

How to use M+ , M- , MRC - Memory operations?

Whenever you press M+ or M- the number on the display will be added or subtracted respectively from the value present in the memory. By default the value in the memory is set to 0.
MRC will return the value from the memory and show it on the display. When pressed twice subsequently it will Clear the Memory.

How to use Mark Up (MU)?
Formula: 100*F/(100-D)

Sequence:
1.Enter F = 10
2.Press MU
3.Enter D = 20
4.Press %. Answer = 12.5