decor Ltd has the following figures regarding its inventory. cost price per unit $50 per unit , . storage cost per unit $5 per unit, annual usage 100 000 units, normal delivery time $2.5 weeks, insurance cost per unit $5 per unit, interest rate is 9%, ordering cost per unit $80, safety stock 5000 unit. There are 50 normal working weeks per year and four weeks per month. REQUIRED: 1. calculate the economic order quantity(EOQ). 2. calculate the number of orders per year. 3. determine the odering cost per year