A shopkeeper has a sale of Rs.10,000, Rs.5,500, 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 sat of Rs.9,000 in five months?

Rs.10,200 Rs.8,500 Rs.11,000 Rs.9,000

Rs.11,000

Sum of sales of five months = 9000 x 5 = 45000 Sum of sales of 4 months = 10000 + 5500 + 8000 + 10500 = 34000 Sale of 5th month = 45000 - 34000 = 11000