Calculate the cost of each of these plans:

Plan 1:

Producing the monthly needs by varying the number of operators. The computing of the variation of the workforce is done according to the preceding month.

Plan 2:

Producing average monthly forecast demand over the six months by varying the workforce only the first month and maintaining the constant workforce after.

Plan 3:

Producing the lowest monthly forecast demand (April) by varying the effective the first month and

maintaining the constant workforce after. The company uses subcontractors for unmet needs through domestic production. Even, in case of subcontracting, the company C&C supports the storage costs and the materials costs.

The sales forecast for January to June are as follows (in units): 1800, 1500, 1100, 900, 1100,

and 1700.

The initial stock in early January and that of June were 400 units. The company has no

obligation to maintain stocks in other months. The initial workforce is 42 operators. Company

policy prohibits overtime; and the calculations should be made on the basis of 8 working

hours per day, 20 days a month.

The following cost elements were identified in the company's accounts:

Materials cost.......................................... 100 / unit

Inventory holding cost..........10 / unit-month

Shortage cost................. 50 / unit-month

Subcontracting cost................ 100 / unit (excluding material)

Hiring and training costs ... 1,000 / hiring

Lay-off cost...................... 2,000 / dismissal

Working time per unit............5 hours

Labor cost................ 15 / hour