Albert, Bob and Cal each gave a birthday gift to their friend Don, who was so impressed by the presents, that he exclaimed: "Good thing your parents gave you credit cards!" Bob explained that those cards had already been confiscated by the parents of each, and that they had to spend cold hard cash. Albert continued: "We pooled our money, and I spent 50 cents more than 1/4 of the total amount. Bob spent a dollar more than half of what was left after I bought your present, and Cal spent $1.50 more than 3/4 of what was left then. At the end, we only had $5.50 left, so we were forced to share one Big Mac, medium fries and a medium drink." How much did each spend on Don's present?