Good day kindly assist with this question?

Question 32 A national chain of tyre fitters stocks a popular tyre for which the following information is available. The company operates on 50-week year and normally operates from Monday to Friday only. Not yet answered 140 tyres per day Marked out of 2.00 Average usage Remove flag Minimum 90 tyres per day usage Maximum 175 tyres per day usage 10 to 16 days Lead time 3 000 Reorder quantity Cost per tyre N$1 500 Holding Cost per unit 3% of unit cost Ordering Costs per order N$75.50 Calculate the average level of inventory