Kar Associates makes beds and boxes. Each box takes 4 hours of labour from the polish department and 2 hours of labour from the paint. Each bed requires 3 hours of polish and 1 hour of paint. During the current month, 240 hours of polish time are available and 100 hours of paint time. Each box produced gives a profit of Rs 7000 and each bed a profit of Rs 5000. How many beds and boxes should be made in a month in order to maximize profit? What is the maximum profit