A grocery shop has a sale of Rs. 6335, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?
Choose the most appropriate option:
A) 4857
B) 4184
C) 4012
D) 5091
E) 5291

Rationale: "let the sale in the sixth month = x then ( 6335 + 6927 + 6855 + 7230 + 6562 + x ) / 6 = 6500 = > 6335 + 6927 + 6855 + 7230 + 6562 + x = 6 × 6500 = > 33909 + x = 39000 = > x = 39000 − 33909 = 5091 answer : d"
Answer: D