# A shopkeeper allows his cusotmers 20% off on the MP of a goods& still gets a profit of 25% what is the cost of article marked Rs 500

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So, Selling price = Rs.(500-20/100*500) = Rs. 400

So, x + 25% of x = 400

or, 5x/4 = 400

or, x = 320

So, cost price = Rs. 320