A factory produces two items: ceiling lights and ceiling fans by using two machines A and B. Machine A has at most 120 hours available and machine B has a maximum of 144 hours available. Manufacturing of a ceiling light requires 5 hours in machine A and 4 hours in machine B, while manufacturing of a ceiling fan requires 4 hours in machine A and 8 hours in machine B. If the factory gets a profit of Rs 50 per ceiling light and Rs 80 per ceiling fan, how many ceiling lights and ceiling fans should be manufactured to get maximum profit?