In the month of March, Dalip earned on an average ₹501 per day. For the first 18 days, his average earning was ₹495 and, for the last 15 days, his average earning was ₹505 . On 18th March, he earned ₹50 more than that earned on 17th March. How much (in ₹) did he earn on 18th March?
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