The proprietor of a little store plans on buying $1,500 worth of products to be increased 40% dependent on the selling cost. Of this he will have bought $200 worth of "floor merchandise", which will...

 The proprietor of a little store plans on buying $1,500 worth of products to be increased 40% dependent on the selling cost. Of this he will have bought $200 worth of "floor merchandise", which will sell for $250. In case he is to keep up with the wanted 40% markup on the all out buy, what markup % is required on the equilibrium of the buys?