Miscellaneous 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
1
and C
n
are known:
a.
Key in C
1
, the cost of the first unit and press \(³).
b.
Key in C
n
, the cost of the nth unit and press \(³).
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
1
and r are known:
a.
Key in C
1
and press ?1. Key in r and press ?2. (Note: This step may be
skipped if step 2 has just been done).
b. Key in the number of units, n and calculate C
n
, the cost of the nth unit by pressing
RPN: g(016t.
ALG: g(019t.
4. To calculate the average cost per unit of the ith through jth unit, C
ij
, if C
1
and r are
known.
a.
Key in C
1
and press ?1. Key in r and press ?2. (Note: This step may be
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(025t.
ALG: g(032t.
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
1
was $875).
12c platinum / 12C
RPN Keystrokes
12c platinum
ALG Keystrokes
Display Comments
875\ 875³
875.00
395\ 395³
395.00
100t 100t
0.89
Actual r.
500g(016t 500g(019t
299.14
Cost of the 500th unit.
1000\ 1000³
1000.00
500g(025t 500g(032t
280.00
Average cost of the 500th thru
1000th unit.
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