It is week $1$ and there are currently $20$ As in stock. We need $300$ As at the start of week $5.$ If there are scheduled receipts planned for week $3$ and week $4$ of $120$ As each and A has a lead time of $2$ weeks, when and how large of an order should be placed to meet the requirement of $300$ As$?$

Part $2$

A$.$

Week$5,40$ As

B$.$

Week$4,40$ As

C$.$

Week$4,300$ As

D$.$

Week$1,300$ As

E$.$

Week$3,40$ As