Problem:
A store sells original local and imported compact discs. Theowners buy the local CD for Php200 then sell it for Php450; and buyan imported CD for Php450 then sell it for Php800. They can buy 200to 350 pieces local CD and import 150 to 300 pieces of imported CDbut not more than 500 pieces of both. How many pieces of local andimported CD should they buy to maximize their profit?
Expert Answer
Let L be the number of pieces oflocal CDs the firm buys and I be the number of pieces of importedCDs the firm buys.
Profit that the firm
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