A grocer has a sale of Rs. 6435, 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 correct choice from the following choices
A) 4551
B) 4771
C) 4991
D) 4881
E) 4661
Let the sale in the sixth month =x   Then (6435+6927+6855+7230+6562+x)/6 =6500   =&gt; 6435+6927+6855+7230+6562+x =6×6500   =&gt; 34009+x=39000   =&gt; x=39000−34009=4991   Answer is 4991.
<result>C</result>
A grocer has a sale of Rs. 6435, 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?