Quality control is not only a matter of saving money, actually. I think it will bring much more profitable good to the company if they did great job on quality control. First, quality control is defined with the acceptance criteria of a good before it goes to the market. This means we only need a good standard to meet that if the manufacturing technique could do it, this would not be a problem. The only cost left would go to the human resource. If the whole company has a spirit of making every product nearly perfect, then the staff cannot be inattentive to their duties because they want to save their job. That will not be considered as a big cost since all you need is to build up a good spirit. If the reputation is built to known as nearly to zero complaint every year, the sales growth would no longer be a problem. Besides, in the long run, the biggest benefit of maintaining good quality is that there will be no expense on going to courts, facing with angry comments online, or trying to cover up bad news coverage, which could go much worse and the amount of cost is enough to make the business go bankrupt.