Gardner Inc. offers three types of beds: Too Hard, Too Soft, and Just Right. In the past, for every 200 customers who buy a bed, 80 buy the Too Hard, 50 buy the Too Soft, and 70 buy the Just Right bed. Gardner has calculated a breakeven point of 1,200 beds per month. In reaching break-even, how many of the 1,200 beds will be Just Right?