initial inventory $=70$ units. Lead Time: two weeks

S $=$ $ $40(1-4),$ $ $15(5-7),$ $ $10(8-10)$ usd$/$order

H $=$ $ $1(1-3),$ $$0\mathrm{.}5(4-6),$ $ $0\mathrm{.}7(7\mathrm{.}10)$ usd$/$week

$12345678910$

Net requirements $371955128053534211$

Orders

Ordering cost

Inventory on$-$hand

Holding cost