If the average total cost are Rs 54, average variable cost is Rs 36 and quantity produced is 2500 units, find the total fixed costs (in Rs) of the firm?
P, Q, R and S are playing a game of carrom. P, R and S, Q are partners. 'S' is to the right of 'R'. If 'R' is facing West, then 'Q' is facing which direction?