HP 12C Programming Part II: Weekday Number, Gross Up Calculation
Here is Part II of the HP 12C programming series.
Here is Part II of the HP 12C programming series.
HP 12C Weekday
Number
This program determines (“extracts” in a sense) the
workday number of a given date. I have
this program set to work properly after January 6, 1800, which was a
Monday. The results translate as
follows:
1 = MON
2 = TUE
3 = WED
4 = THU
5 = FRI
6 = SAT
7 = SUN
The HP 12C is assumed to be use the United States date
format (M.DY – [ g ] [ 5 ]).
Program:
STEP

CODE

KEY

COMMENT

01

1

1


02

48

.

Decimal point

03

0

0


04

6

6


05

1

1


06

8

8


07

34

X<>Y


08

43, 26

ΔDYS

Days between dates
function

09

7

7


10

10

÷


11

43, 24

FRAC


12

7

7


13

20

*


14

1

1


15

40

+


16

43, 33, 00

GTO 00


Input: Date in
MM.DDYYYY format, [R/S]
Result: Date indicator
Test 1: May 22, 1999.
Input: 5.221999
[R/S]
Result: 6
(Saturday)
Test 2: July 11,
2016
Result: 1 (Monday)
HP 12C Gross Up
Calculation
We have to pay a person, and the person lives outside of
your tax jurisdiction (outside of your state or the United States). Tax withholding may be required. However, you or someone else that is
requesting the payment wants the face amount.
In order to give the face amount and fulfill the tax requirement at the
same time, the payment is must be grossed up.
Link to the Investopedia article: http://www.investopedia.com/terms/g/grossup.asp
Formulas:
Gross up Amount = Face Amount/(1 – Tax Rate%)
Amount of Tax = Gross up Amount – Face Amount
Program:
STEP

CODE

KEY

COMMENT

01

44, 0

STO 0

Store Tax Rate

02

34

X<>Y


03

44, 1

STO 1

Store Face Value

04

45, 0

RCL 0


05

1

1


06

25

%


07

1

1


08

30




09

16

CHS


10

45, 1

RCL 1


11

34

X<>Y


12

10

÷


13

31

R/S

Display Gross up
Amount

14

45, 1

RCL 1


15

30




16

43, 33, 00

GTO 00

Display Tax

Input: face value,
[R/S], tax rate, [R/S]
Result: gross amount, [R/S], tax
Part 1: Face
Value: $1,000, Tax Rate: 30%.
Input: 1000 [R/S],
30 [R/S]
Result: 1428.57
[R/S], 428.57 [R/S]
The gross up amount is $1,428.57 (total amount to be
paid), and corresponding tax is $428.57.
Part 2: Face
Value: $2,500, Tax Rate: 7%.
Input: 2500 [R/S],
7 [R/S]
Result: 2688.17
[R/S], 188.17 [R/S]
The gross up amount is $2,688.17 (total amount to be
paid), and corresponding tax is $188.17.
Another note, I will be taking some time off and plan to be back within two weeks. I want to thank all of you readers and those who commentators, this blog would not be the success that it is without you. Enjoy summer (or winter if you are in the Southern Hemisphere) and we'll talk again.
Eddie
This blog is property of Edward Shore, 2016.
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