A grocer has a sale of Rs. 5420, Rs. 5660, Rs. 6200, Rs. 6350 and Rs. 6500 for 5 consecutive months. Find the sale he should have in the sixth month, so that he gets an average sale of Rs. 6400? Choose the correct answer:
A) Rs. 5870
B) Rs. 8270
C) Rs. 6020
D) Rs. 6850
E) None of these
Explanation:   Total sale for 5 months = Rs. (5420 + 5660 + 6200 + 6350 + 6500) = Rs. 30,130   Therefore, required sale = Rs. [(6400 * 6) – 30,130] = Rs. (38400 – 30,130) = Rs. 8270   ANSWER Rs. 8270
<result>B</result>
A grocer has a sale of Rs. 5420, Rs. 5660, Rs. 6200, Rs. 6350 and Rs. 6500 for 5 consecutive months. Find the sale he should have in the sixth month, so that he gets an average sale of Rs. 6400?