2.12. A company wants to develop a level production plan for a family of products. The opening inventory is 500 units, and a decrease to 100 units is expected by the end of the plan. The demand for each of the months is given in what follows. How much Production Planning System 37 should the company produce each month? What will be the ending inventory in each month? Do you see any problems with the plan? Month Jan Feb Mar Apr May Jun Total Working Days 20 22 20 20 18 19 Forecast Demand 1200 1300 800 700 700 900 Planned Production 500 Planned Inventory