Dean owns a t-shirt company and notices that his profit margin is going down. He decides to strategize on ways to increase his profit margin. First, he calls Company A, and known clothing distributor, and gets a quote for 600 t-shirts at $3.00 each for a total of $1,800. Next, he calls another clothing manufacturer, Company B, and poses the same question. Company B will sell him the exact same 600 shirts at $2.75 each for a total of $1,650. Which implied strategy has Khaled used to increase his profit margin by a quarter for each purchase?