On an average, 4 patients per hour require the service of an emergency clinic. Also, on an average, a patient requires 10 minutes of active attention. The clinic can handle only one emergency at a time. Suppose that it costs the clinic Rs 300 per patient treated to obtain an average servicing time of 10 minutes and that each minute of decrease in this average time would cost Rs 50 per patient treated. How much would have to be budgeted by the clinic to decrease the average size of the queue from 4/3 patients to 1/2 patients?