$3.$ Weekly demand for Lego at a Wal$-$Mart store is $2500$ boxes. The replenishment lead time is two weeks; the cost of ordering is $ $231$ and cost of holding $($per item per year$)$ is $20\%$ of item cost, which is $$3$ per unit. We are assuming there are $52$ weeks in one year.

a$.$ Find the economic order quantity $($round to the nearest thousand$),$ reorder point, time between orders, average inventory level, and total annual variable cost, assuming there is no uncertainty in demand.