More particularly, the price unit 10 includes a price unit 10 for adding a price, a price unit 10 installed below the price unit 10, A moving unit 20 which is movable by a moving unit 20 having an infrared transmitting and receiving unit 25 at a lower portion thereof and a moving line 20 which is recognized by an infrared transmitting and receiving unit 25 of a moving unit, 30 so that the moving part recognizes the moving line drawn on the floor and moves along the moving line to perform the price practice so as to improve the efficiency of the price practice and further improve the fun and interest of the user.;
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