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

Web Site:  https://www.casio-intl.com/asia/en/calc/products/MC-12M/

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. 

Retro Review: Canon Palm Printer P1-DH V

Retro Review:  Canon Palm Printer P1-DH V

Quick Facts:

Model:  Palm Printer P1-DH DV
Company:  Canon
Type:  Printing
Years:   I think this model is around 2016, not sure, I got this from a search on Amazon.  The current version is P1-DH V3
Display:  12 digits
Batteries:  4 AAA Battery and/or AC Adapter AD-380
Original Retail Price:  about $30.00 to $35.00
Logic:  Chain

This review is on an older model P1-DH DV.  I think the current version at the time of this post is the P1-DH DV3. 

I will focus my review on the keyboard and features only, not on the printing features. 

The calculator will operate on AC power alone, without batteries, which I like. 

Unlike most printing calculators, the P1-DH V operates as a four-function Chain calculator instead of an adding machine.  For example:  to add 2, 7, and 11, type:

2 [ + ] 7 [ + ] 11 [ = ]

Result: 20

Features

This is a standard printing calculator that has the following features:

*  Decimal Point Selectors:  F (float, no indicator), 0, 2, 3, 4, A (add mode).  The mode is changed by the key [DEC].   Float is the default mode. 

*  Rounding/Truncate Toggle:  toggle between rounding and truncate with the [5/4] key.  When the 5/4 is on, the calculator is on rounding mode.  Note that this setting has no affect on results on when the decimal point selector is set to Float.

Example:

Float Mode:
1 [ ÷ ] 6 [ = ] returns 0.16 666 666 666

2 Decimal Place Mode:  (2 indicator)
5/4 on (Rounding mode):  1 [ ÷ ] 6 [ = ] returns 0.17
5/4 off (Truncate mode):  1 [ ÷ ] 6 [ = ] returns 0.16

*  One memory register is available, with sum and difference.   When [ M+ = ] is pressed, the calculation is completed and is added to the memory register.   When [ M- = ] is pressed, the calculation is completed and is subtracted from the memory register.

Example:

1000 * 298 + 928 * 172 - 442 * 180

[ RM/CM ] until memory is cleared
1000 [ × ] 298 [ M+ = ]
928 [ × ] 172 [ M+ = ]
442 [ × ] 180 [ M- = ]
[ RM/CM ]
Result:  378,056

*  Time Calculations:  You can enter hours-minutes for calculations in either AM/PM or 2400 hour format by using the [TIME CAL] key.  You know the calculator is ready to accept hours-minutes when the screen shows 00:00.  In AM/PM mode, switch between AM/PM by use the [TIME CAL AM/PM] button.  To calculate the difference between times, the required key is the key with the tilde mark on it.  ( [ ~ ] )

Example:  What time has passed between 23:17 and 11:16?  (2400 hours)

[TIME CAL] [TIME CAL] (00:00 without an AM/PM indicator means 2400 hours):
2 3 1 7 [ ~ ]
1 1 1 6 [ = ]

11:59 (11 hours, 59 minutes)

* Cost/Sell/Margin and Sales Tax Calculation.  See the next section.

The [ B ← → T ] Key

The [ B ←→ T ] rules what functions the blue keys execute on the P1-DH V. 

Indicator T:  Tax Mode (Default mode)

[ TAX+ ]:  Add tax using the rate stored
[ TAX- ]:  Subtract tax using the rate stored
[ RATE ]:  Press this key to enter the tax rate (RATE will be blinking), press [ RATE ] again to finish

Indicator B:  Business Mode

[ COST ]:  Cost
[ SELL ]:  Sell
[ MARGIN ]:  Margin

Enter any of the two values, the third is automatically calculated.

Example: 
Sell = $29.95,  Margin = 8%

[ B ←→ T ] until B appears
29.95 [ SELL ] (SELL flashes)
8 [ MARGIN ]

Result:  27.55 (COST indicator)

Keyboard

The keyboard is nice and light.  The keys are rubber and very responsive.  The key response and register is great.  My hands are a little too big but it is possible to speed calculate on the Palm Printer. 

I like the screen but I wish the indicators were bigger, as they are too tiny for my preference.  Just make sure you triple check which mode you are in.  This model I purchased in December 2019 at a Revivals Store in Palm Springs. 

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.