Windsor Company specializes in manufacturing a unique model of bicycle helmet. The model is well accepted by consumers, and the company has enough orders to keep the factory production at $10\mathrm{.}000$ helmets per month $(80\%$ of its full capacity$).$ Windsor's monthly manufacturing costs and other expense data are as follows.

$($a$)$

Enter each cost item on your answer sheet, placing the dollar amount under the appropriate headings. Total the dollar amounts in each of the columns