gular Time

Overtime

Subcontract

Demand Forecast

$1$

$30$

$15$

$15$

$50$

$2$

$30$

$15$

$15$

$45$

$3$

$30$

$15$

$15$

$45$

Initial inventory

$30$ units

$$Regular$-$time cost per unit

$$$$100$

Overtime cost per unit

$$$$150$

Subcontract cost per unit

$$$$250$

Carrying cost per unit per month

$$$$6$