The East Company manufactures several different products. Unit costs associated withProduct ORD$210$ are as follows:Direct materials $$54$Direct manufacturing labor $8$Variable manufacturing overhead$11$Fixed manufacturing overhead $25$Sales commissions $(2\%$ of sales$)5$Administrative salaries $12$Total$$115$What are the period costs per unit associated with Product ORD$203?$Oa$.$ $$12$O b$.$ $$5$O c$.$ $$17$ d $$18$