A company sells two video games, which for convenience we will call A and B. Video game A sells for $60 per cartridge, while video game B sells for $30 per cartridge. Market research shows that if they sell x thousand copies of video game B, then they can sell y thousand copies of video game A, where
y = (40 − 5x)/(10−x)
Approximately how many copies of each video game should they produce to maxi- mize profits? How much profit can they make?

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