Li mou is engaged in sewing work in a private clothing enterprise. The company implements piecework wage system for sewing positions, which stipulates that employees shall be paid 50 yuan for each piece of clothing completed.Li mou is average monthly salary is 3200 yuan or so, when efficiency is high, can get 3600 yuan or so.Have period of time, because the company needs to rush to make a batch of fashionable dress, be in li mou already achieved the circumstance of regulation working hours, classics negotiates with labor union and worker oneself, arrange li mou to wait for a person to work overtime in rest day.Later, the company with li mou monthly salary 3200 yuan as the base, convert out its average hourly wage standard, and accordingly to its overtime pay. Li mou thinks the company's practice is unreasonable, because during working overtime, she is urgent to the company, works very hard, and the work efficiency is the highest as usual, so she thinks the company should calculate the overtime salary with 3,600 yuan per month as the base, or at least with the average monthly salary of 3,400 yuan as the base.For this, li mou consults to concerned orgnaization, the practice that hopes to understand a company is reasonable, how should determine her overwork salary computation base. How should decide li mou's overwork salary computation base?What's the reason?