A tailor shop that deals with mosquito net making received a contract to deliver to mosquito nets to a bungalow. They had to deliver no. of mosquito nets 100, 250, 190, 140, 220, 110, respectively for next six months. Now, it is known that production cost can vary along this period. Production cost is estimated to be Rs. 50, 45, 55, 48, 52, 50 over next six months. The shop owner thinks that there is a chance of saving if it is possible to take the advantage of the fluctuations in manufacturing cost. Hence, the shop can produce more mosquito nets than required in a given month and hold the extra units for delivery at later months. However, it can incur an additional storage cost of Rs. 8 per window net per month. Formulate the problem as an LP model.