Kantabai bought 1.5kg tea and 5kg sugar from a shop. She paid ₹50 as fare for rickshaw. Total expense was ₹700.Then she realised that by ordering online the goods can be bought with free home delivery at the same price. So next month she placed the order online for 2 kg tea and 7kg sugar and paid ₹880 .Find the rate of sugar and tea per kg.