Inventory control subject $to$ known demand $(1)$

A food store considers importing a special kind $of$ smoked sausages for sale. The store estimates that the demand $is$ stable $at2100$ per year. The cost $of$ placing $an$ order and getting $it$ delivered $is2000kr.,$ and the cost $of$ the sausages $is18\mathrm{.}50kr.$ each. The store uses $an$ annual internal interest rate $of22\%$ for the cost $of$ capital. $In$ addition, they operate with a storage cost $of3\%of$ the value $of$ the item, and a cost $of2\%$ for taxes and insurance.

$a$