HP 12c Solutions Handbook page 43

calculate the total amount remaining in the account after a series of
transactions on specified dates.
KEYSTROKES
CLEAR
3
6
5
0
2
1
0
1
DISPLAY
00-
01- 16
02- 13
03- 33
04-
05-
06-
07- 10
08- 12
09- 33
10- 44
11- 15 13
12- 16
13- 31
14- 44
15- 33
16- 44
17- 45
18- 45
19- 43 26
20- 11
21- 15
22- 42 14
23- 15
24- 36
25- 45 13
42
3
6
5
0
2
1
0
1