You need to buy some filing cabinets. You know that Cabinet A costs $10 per unit, requires six square feet of floor space, and holds eight cubic feet of files. Cabinet B costs $20 per unit, requires eight square feet of floor space, and holds twelve cubic feet of files. You have been given $140 for this purchase, though you don't have to spend that much. The office has room for no more than 72 square feet of cabinets. How many of which model should you buy, in order to maximize storage volume?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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You need to buy some filing cabinets. You know that Cabinet A costs $10 per unit, requires six square feet of floor space, and holds eight cubic feet of files. Cabinet B costs $20 per unit, requires eight square feet of floor space, and holds twelve cubic feet of files. You have been given $140 for this purchase, though you don't have to spend that much. The office has room for no more than 72 square feet of cabinets. How many of which model should you buy, in order to maximize storage volume? 

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