A shopkeeper earned a profit equal to cost price of 6 items while selling 36 items together. Each item is marked at 20% above the cost price. If discount given on each item is Rs. 40, then the cost price of each item is:
Let CP of each item =Rs. x
MP of each item = 1.2x
SP of each item = (1.2x - 40) ----(i)
CP of 36 items = 36x
SP of 36 items = (36x + 6x) = 42x
.'. SP of each item = 42x/36 = (7/6)*x ----(ii)
Comparing SP of (i) & (ii), (1.2x - 40) = (7/6)*x
Solving, we get x=1200
Correct Option 3)