The average wages of a worker during a fortnight comprising 15 consecutive working days was $90 per day. During the first 7 days, his average wages was $87 per day and the average wages during the last 7 days was $91 per day. What was his wage on the 8th day? Choose the correct option:
A) $83
B) $90
C) $92
D) $97
E) $104
Average daily wage of a worker for 15 consecutive working days = 90$   During the first 7 days , the daily average daily wage = 87$   During the last 7 days , the daily average daily wage = 91$   Wage on 8th day = 90*15 -( 87*7 + 91 *7)   = 1350 - (609 + 637)   =1350 - 1246= 
<gadget id="calculator">1350 - 1246</gadget>
<output>104</output>
104   Answer $104
<result>E</result>
The average wages of a worker during a fortnight comprising 15 consecutive working days was $90 per day. During the first 7 days, his average wages was $87 per day and the average wages during the last 7 days was $91 per day. What was his wage on the 8th day?