Let the cost price of the skirt be x.
According to the given information, Sunita sold the skirt at a profit of 15%. This means she sold the skirt for x + 0.15x = 1.15x.
The profit made by Sunita is ₹150. Therefore, profit = Selling price - Cost price
So, 150 = 1.15x - x
150 = 0.15x
Divide by 0.15 on both sides
x = 150 / 0.15
x = ₹1000
Therefore, the cost price of the skirt was ₹1000.