A national chain of tyres fitter stock a popular tyres for the following in on 50 week year and normally operates from Monday to Friday only calculate minimum levels ,maximum level , re-order level, EOQ and average stock level given average usage 140 tyres per day, minimum usage 90 tyres per day, maximum usage 175tyres per day, lead time 10 to 16 day , re-order quantity 3000 unit, cost per tyre N$1500 ,holding cost per unit 3% of unit cost and ordering cost per order N$ 75.50