Compare the solution in Part $4$ to the original order quantity from Part $1.$

What is the change in total annual inventory holding cost for SKU Z$198$Q$?($For instance, if your order quantity from Part $4$ leads to an annual inventory holding cost of $$3,800$ and your order quantity from Part $1$ leads to an annual inventory holding cost of $$4,200,$ the solution is $$3,800-$$$4,200=-$$$400$ and you answer $-400.)$