Question 1201877
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First, the company must produce 100 units of lumbers and 150 units of plywood that are required by regular customers.


Then they can start thinking.


Obviously, the rest 400 - (100+150) = 150 units should be plywood, since a unit of plywood 
generates higher profit than a unit of lumber.


It is called "use the most aggressive strategy".


<U>ANSWER</U>.  The last 150 units should be plywood.
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Solved, with explanations.