Plan B: Produce at a constant rate of 1 comma 300 units per month, which will meet minimum demands. Then use subcontracting, with additional units at a premium price of $80 per unit. Subcontracting capacity is limited to 900 units per month. Evaluate this plan by computing the costs for January through August.

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Subcontracting costs amounts to $210,000 for the 8 months

Volumes subcontracted are

Mar 400

Apr 509

May 700

Jun 700

July 400

Aug 100

Total 2,800

Inventory holding cost is $4,000. Only inventory in hand was 200 units in January

Explanation:

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Given:

howler monkey: {15, 16, 17, 17, 17, 17, 18, 19}
spider monkey: {12, 13, 13, 14, 14, 14, 16, 16}

The mean of the first set (howler monkey) = (15 + 16 + 17 + 17 + 17 +17 + 18 + 19)/ 8 
The sum of all weights is divided by the number of monkeys weighed (n = 8)

mean = 17

Do the same for the second set (spider monkey) = 12+ 13 + 13+ 14 + 14+ 14 +14 +16 + 16 / 8

mean = 15.75

The ratio of the two is 17:15.75 or 1.08 is to 1.