Bell Computers purchases integrated chips at $$$ per chip. The holding cost is $$$ per unit per$$ year, the ordering cost is $$$ per$$ order, and sales are steady at per month. The$$ company's supplier, Rich Blue Chip$$ Manufacturing, Inc., decides to offer price concessions in order to attract larger orders. The price structure is shown below. b$)$ Bell Computers wishes to use a $\%$ holding cost rather than the fixed $$$ holding cost in part a$.$ What is the optimal order$$ quantity, and what is the optimal annual$$ cost$?$

The optimal order quantity after the change in the holding cost calculation is $$

$200$ units $($enter your response as a whole $$number$).$ The total annual cost for Bell computers to$$ order, purchase, and hold the integrated chips is $$$ enter your response here $($round your response to the nearest whole$$ number$).$