Suppose you are laying out a floor stack area with an aisle 14 feet (4.3 meters) wide to accommodate forklift trucks. All pallets are 48 by 40 inches (1200 by 1000 mm) and are stored with the 40-inch side facing the aisle. Assume that each SKU experiences demand that is constant and is reordered once each inventory cycle as below. (Remember, a used in the formulas is the aisle measured in pallet positions.)

SKU	Order Quantity	Stack height	order cycle
A	29	3	4
B	32	2	3
C	18	1	6
D	5	3	2

a) For each SKU, compute the optimal lane depth.

b) Compute a single, common lane depth that will be space-efficient for the set of SKUs