Production required in January, February, and March respectively are 600, 1940, and 1360 units. One worker during the panning horizon can produce 4 units in one day. The number of workdays is 21 in January, 20 in February, and 23 in March. Assume that the beginning inventory is 350 units and the ending inventory required is 250 units.

Using constant workforce and varying inventory and stock out (Level Strategy), what would be the constant workforce?