How do you keep a running subtotal on the HR100-TM calculator

https://www.amazon.com/ask/questions/Tx2O8NFDQMEMQYI

You can use the *key as your subtotal key.
This calculator supports stacking calculations with subtotals. Here is an example of how to do it:
-STEP 1
Start with your first calculation sequence. In this example the first stack will be the sum 100+1500+252
-Enter the values and after each value, press the +=key to add.
-After the last value, press the += key and then press the *key to have your first subtotal.
-Without pressing the CAkey, start just after the last step your next calculation stack. In this example, it will be 2500+451+589
-Enter the values and add them as the first stack.
-After the last value, press the *key. Here you will have the second stack total (or the second subtotal value).
-Press the G*key to have the grand total value (the sum of all subtotal values).
The paper strip will show like this:
..0..
100.+
1,500.+
252.+
1,852; *
2,500. +
451.+
589.+
3,540. *
5,392.

https://www.google.com/search?q=SUBTOTAL+KEY+ON+CASIO+hr-17ORC

..

Could it be subtotal? You should read the manual, this probably explained in it.

While in the D position or PD position, N Count
is OFF. In the N Count N position every
Plus, Minus, Equals Plus, Equals Minus,
Memory Plus or Memory Minus key depression
is counted. The Accumulator and its N Count
or the GT N Count can be printed by
depression of the Subtotal or Total key. When
either Memory Subtotal or Memory Total is
depressed, Memory N Count will print. N Count
is always printed in red, left justified. If the
Equals key is depressed immediately after the
Subtotal Total, Memory Subtotal, or Memory
Total the average of the entries is printed.
When the N Count prints on the 7150, an audit
symbol will print to the left of the N Count.
The audit NA will identify the Accumulator
register N Count, NG will identify the GT
register N Count and NM will identify the
Memory N Count.

To calculate 7-2=5 (for example) on a business calculator:
7 + (all positive entries are followed by the + key)
2 - (all negative entries are followed by the - key)
* (The Total key, marked with a star or a T finishes the calculation.)

It seems strange to people who use handheld calculators, but this is how adding machines have worked since the days of hand-cranked adding machines. The subtotal key (marked with S or a diamond) prints the running total without clearing it back to zero.

Did it calculate on subtotal before? Are you sure it has been set to do this?

To print the current date press once the Clock/Calendar key and then press once the Non Add/ Subtotal key (# key)
To print out any other date (or codes and other numbers that are not part of a calculation) just type it and then press the Non Add/ Subtotal key (# key). The date/number will be printed preceded by the # sign.
You may also want to download the SHARP EPL-1801PIII Operation Manual

Enter 3 press Subtotal enter 0125 press Subtotal enter tax (ex 9 3/4% = 9 decimal point 75) press CA/AmtTend enter 5002 CA/AmtTend press Subtotal

Got this info from Casio Support page
http://www.casio.com/support

To get a subtotal when adding, finish entering the last number before the subtotal, hit the +, then hit the diamond/pound sign key (just above the 7)

To get a grand total when adding, finish entering the last number in your list, hit the +, then hit the *.

3
SUBTOTAL
1722
SUBTOTAL
40
CASH
SUBTOTAL

+ Key is the Subtotal