A grocer has a sale of ₹8,435, ₹8,927, ₹8,855, ₹9,230 and ₹8,562 in 5 consecutive weeks. How much sale must he have in the 6th week so that he gets an average sale of ₹8,500?

₹6991

Total sale of 6 weeks = 6 × 8500 = 51000

Sum of sales of 5 weeks = 8435 +  8927 + 8855 + 9230 + 8562 = 44009

Sale of 6th week = 51000 - 44009 = Rs6991