In: Economics
Labor |
MPL |
MPL /PL |
Capital |
MPK |
MPK /PK |
1 |
24 |
1 |
40 |
||
2 |
16 |
2 |
30 |
||
3 |
12 |
3 |
28 |
||
4 |
8 |
4 |
10 |
||
5 |
4 |
5 |
5 |
Given, PL = $4 and PK = $8
Required rule is as below:
(MPL / PL) = (MPK / PK)
If the above equality is not maintained exactly, the difference must be close.
The table should be completed as below:
Labor |
TPL |
MPL |
MPL/PL |
Capital |
TPK |
MPK |
MPK/PK |
1 |
24 |
24 |
24/4 = 6 |
1 |
40 |
40 |
40/8 = 5 |
2 |
24 + 16 = 40 |
16 |
16/4 = 4 |
2 |
40 + 30 = 70 |
30 |
30/8 = 3.75 |
3 |
40 + 12 = 52 |
12 |
12/4 = 3 |
3 |
70 + 28 = 98 |
28 |
28/8 = 3.5 |
4 |
52 + 8 = 60 |
8 |
8/4 = 2 |
4 |
98 + 10 = 108 |
10 |
10/8 = 1.25 |
5 |
60 + 4 = 64 |
4 |
4/4 = 1 |
5 |
108 + 5 = 113 |
5 |
5/8 = 0.625 |
Since there are 138 units,
TPL + TPK = 138
TPL of 2 labor is 40 and TPK of 3 capital is 98; combining these two (40 + 98 =) 138 units.
Minimum cost = 40 × $4 + 98 × 8
= 160 + 784
= $944 (Answer)