A shopkeeper has a sale of Rs. 10,000, Rs. 7,500, Rs. 8,000 and Rs. 10,500 for 4 consecutive months. How much sale must he have in the fifth month so he gets an average sale of Rs. 9,000 in five months?
1
Rs. 10,200
2
Rs. 8,500
3
Rs. 11,000
4
Rs. 9,000