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 $$18^{th}$$ March, he earned ₹50 more than that earned on $$17^{th}$$ March. How much (in ₹) did he earn on $$18^{th}$$ March?

A

498

B

501

C

500

D

502