7. The charges of hired car are Rs 4. per km for the first 60 km, Rs. 5 km for the next 60 km and Rs. 8 for every 5 km for further journey. If the balance amount left over with Subhash is 1 **/** 4 of what he paid towards the charges of the hired car for travelling 320 km, how much money did he have initially with him?