First, the decimal point is judged to be one place forward, because the total number is reduced. Then subtract 24.06 from 38. 1, and the figure should be the original price of Harry Potter minus the later wrong price. Since the decimal point goes one place ahead, the price should be one tenth of the original price, 38. 1-24.06= 14.04 is nine tenths of the original price, and the original price is 14.