The MRP gross requirements for item A are shown here for the

next $10$ weeks. Lead time for A is three weeks and setup cost is

$$10.$ There is a carrying cost of $$0\mathrm{.}01$ per unit per week. Beginning

inventory is $90$ units.

Use the least total cost or the least unit cost lot$-$sizing method to

determine when and for what quantity the first order should be

released.