Bharati Fibre Products Limited produces a special fibre in its plant at the rate of 5000 metres per hour. The fibre is used in the other products made by Bharati, at the rate of 20,000 metres per day in an 8-hour day. The cost of fibre is Rs. 5 per metre. The inventory carrying charges are 25% and the set-up costs are Rs. 450 per run. Compute the optimal number of cycles required in a year for the manufacture of this special fibre.