"A partially completed inventory record for the motor subassembly is shown in Figure $11\mathrm{.}39.$

a$.$ Complete the last three rows of the record by using the L$4$L rule.

b$.$ Complete the last three rows of the record by using the POQ rule with P $=2.$

c$.$ Complete the last three rows of the record by using the POQ rule with P $=2.$

d$.$ If it costs the company $$1$ to hold a unit in inventory from one week to the next, and the cost to release an order is $$50,$ which of the lot sizing

rules used above will provide the lowest inventory holding $+$ order release cost?"