Sunday, August 16, 2020

Review: Casio MC-12M Shop Calculator

Review:  Casio  MC-12M Shop Calculator



Just The Facts:

Model:  MC-12M Shop Calculator 
Company: Casio
Type:  Desktop 
Display:  12 digits
Battery:  Solar and Battery (AA battery backup)
Logic: Chain
Memory:  Two:  M and Grand Total 
Double Zero Key


I purchased this calculator several months ago at a WalMart for about $11.50. 

Features:

Cost/Sell/Margin Calculation
Change Function
Square Root

The display is set an angle so it is tilted towards the user.  I find the keyboard a pleasure to use.  My hands may be a little big, but with the right size of hands you can speed type on the MC-12M.   The keys are fast and responsive.  

Memory

There are two memories within the MC-12M:  the independent memory M and the Grand Total key.  

The independent memory works with the usual memory plus (M+) and memory minus (M-) keys.   The recall (MR) and clear memory (MC) keys are separate keys on the MC-12M.  

The grand total memory is activated every time you press the equals [ = ] key.  On the MC-12M, the grand total memory is automatic.   The grand total memory is cleared when either [AC/ON] is pressed or the calculator is turned off.  

The Change Feature

The big selling feature of the MC-12M Shop Calculator is the [CHANGE] button.   You enter an amount and press [CHANGE], like you were handed cash in a transaction.   When it is pressed, it compares the amount entered against the amount in the grand total memory registered.  The independent memory is not used in the change feature.  

Example:

You have a $100 bill (C-note) and purchase the following:
1 SD card for $19.95
1 desktop calculator for $11.49  ;)
3 reams of paper for $5.00 each (on sale)
15 pens at $0.49 each
2 USB drives, 32GB for $10.60 each
Sales Tax: 9%

Keystrokes:

[AC/ON]
19.95 [ = ]
11.49 [ = ]
3 [ × ] 5 [ = ]
15 [ × ] .49 [ = ]
2 [ × ] 10.60 [ = ]
[ GRAND TOTAL ]     (Display: 74.99)

[ × ] 9 [ % ] [ = ]

[ GRAND TOTAL ]     (Display/Total Invoice: 81.7391   [$81.74]  )

100 [ CHANGE ]   (Change: 18.2609  [$18.26] )

Percent Change

You can calculate percent change with the use of the minus and percent keys.

%CHG Keystrokes:   new [ - ] old [ % ]

Calculate the percent change from 14.75 to 19.85?

19.85 [ - ] 14.75 [ % ] 

Percent Change:  34.5762711864   (34.5762711864%)

Wishes and Verdict

There are two things the MC-12M Shop Calculator have:

Fix Decimal Selector:  This would be great for the shop because most currency calculations work with 2 decimal places.   My selection of choices would be 0, 1, 2, 3, 4, 6.

I would also like to see the Add Mode added. 

Since this is a shop calculator, I can imagine people using this calculator to calculator areas and volumes, so a π key would be nice.  

π ≈ 3.1415926535

This calculator is nice to operate and hold and yes, I like the square root (which should be present on more desktop calculators).   Worth a look.

Eddie

All original content copyright, © 2011-2020.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author. 

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