please help

The market demand tor PSG's product is 2 000 units per month. Sales are spread evenly throughout the year. The cost price of a unit is R10 each and PEG sells the product at R15 each. Expenditure associated with inventory is as follows: Ordering oost R25 per order Interest rate 20 \"it. per annum Holding oosts R46 per unit Delivery time 2 weeks to 4 weeks Weekly demand 400 600 units Required: Calculate the tollouiing: 3,1, Eoonornic order quantity 3.2. Pie-order point 3.3. Maximum inventory holding 3.4. Minimum inventory holding [3 marks] [3 marks] [2 marks] [2 marks}