A grocer has a sale of Rs. 6400, Rs. 3545, Rs. 9500, Rs. 7500 for 4 consecutive months. How much sale must he have in the fifth month so that he gets an average sale of Rs. 5500?  Choose the correct choice from the following answers.
A) Rs. 480  B) Rs. 555  C) Rs. 499  D) Rs. 490  E) Rs. 500
Total sale for 4 months = Rs. (6400 +3545 +9500 + 7500 ) = Rs. 26945.   Required sale = Rs. [ (5500 x 5) - 26945 ]   = Rs. (27500 - 26945)   = Rs. 555.   Rs. 555)
<result>B</result>
A grocer has a sale of Rs. 6400, Rs. 3545, Rs. 9500, Rs. 7500 for 4 consecutive months. How much sale must he have in the fifth month so that he gets an average sale of Rs. 5500?