The manager of the company Quiprofarmaderm S.A. observed that during 25 working days having a workforce level of 80 people, they produced 25,000 units of their most profitable product satisfactorily. Now you want to plan the level of production and the level of the workforce for that company, you know that the cost of hiring a worker (Ch) is 1000 dollars, the cost of firing him (Cf) is 1800 dollars (includes benefits and average sale) and the cost to hold in inventory for a month is $ 5 per unit; currently the plant has 70 workers and an initial inventory of 3,000 units. The company has the following information:

Month	Demand forecast	Business days	Security stock	Desired ending inventory
1	15,000	15	300	1,500
2	16,000	18	200	1,200
3	12,800	20	100	800
4	18,900	15	300	1,000