The Allianz Company produces a specialty wood furniture product, and has the following information available concerning its inventory items:Relevant ordering costs per purchase order$$450$Required annual return on investment$20\%$Out of pocket costs$$4$Annual demand$30,000$ units per yearPurchase price$$48$ per unitWhat is the relevant carrying cost per unit?Question $4$ Select one:a$.$$$9\mathrm{.}6$b$.$$$4$c$.$$$13\mathrm{.}6$d$.$$$48$