HP 12c Platinum Reference Manual page 137

Program Instructions:
1. Key in the program.
Note: If the average costs are not going to be calculated:
RPN: lines 25 through 48 need not be keyed in
ALG: lines 32 through 67 need not be keyed in
2. To calculate r, the learning factor, if C
a. Key in C , the cost of the first unit and press \(³) .
1
b. Key in C , the cost of the nth unit and press \(³) .
n
c. Key in n, the number of units and press t to calculate r, the learning factor.
3. To calculate the cost of the nth unit when C
a. Key in C and press ? 1. Key in r and press ? 2. (Note: This step may be
1
skipped if step 2 has just been done).
b. Key in the number of units, n and calculate C
RPN: g( 016 t .
ALG: g( 019 t .
4. To calculate the average cost per unit of the ith through jth unit, C
known.
a. Key in C and press ? 1. Key in r and press ? 2. (Note: This step may be
1
skipped if step 2 has just been done).
b. Key in the number of the last unit of the batch, j and press \ ( ³ ).
c. Key in the number of the first unit of the batch, i, and calculate the average cost per
unit by pressing
RPN: g( 025 t .
ALG: g( 032 t .
Example 2: The electronic manufacturer cited in example 1 found that the 100th
instrument actually cost $395 to manufacture. Find the actual learning factor, r , the cost of
the 500th unit and the average cost of units 500 thru 1000. (Recall that C
12c platinum / 12C
RPN Keystrokes
875\
395\
100t
500g(016t 500g(019t 299.14
1000\
500g(025t 500g(032t 280.00
1
12c platinum
ALG Keystrokes
875³
395³
100t
1000³
and C are known:
n
and r are known:
1
, the cost of the nth unit by pressing
n
Display
875.00
395.00
Actual r.
0.89
Cost of the 500th unit.
1000.00
Average cost of the 500th thru
1000th unit.
Miscellaneous
, if C and r are
ij 1
was $875).
1
Comments
137