A retailer purchased radiosets at the rate of Rs. 400 each from a wholesaler. He raised the price by 30% and then allowed a discount of 8% on each set. His profit will be
initial CP = 400/-
after marking 30% up, marked price = 520/-
he allowed a discount of 8%, discount = 41.6/-
selling price = 520 - 41.6 = 478.4/-
%profit = (478.4-400)/400 * 100
      = 19.6%
so the answer is option D.
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