Use the following data :

Opening Stock: $100$ units

Desired Closing Stock : $550$ units

Back order Costs : $ $80/$ unit

In$-$house production costs : $ $65$ per unit

Subcontract Production costs : $ $95$ per unit

Inventory Holding costs : $ $13/$ unit$/$ month

Production Capacity$=20$ units per month per worker

There are currently $=90$ workers employed

Hiring Costs $=900$$ per worker

Firing Cost per worker $=$$$1500$

Month$=6$ months $(1,2,3,4,5,6)$

Forecast Demand for six months

$1$st month$=1890,2$nd month$=2520,3$rd month$=3360,4$th month$=3000,5$th month $=2520,6$th month $=2100$

Calculate for all $3$ strategies given below using above data:

$1.$Chase $($demand matching$)$ strategy

$2.$Production leveling

$3.$ Subcontracting