Question 732982
fred is analyzing the cost of producing two different items at an electronics company. 
An electrical sensing device uses 5 grams of copper and requires 3 hours to assemble. 
A smaller sensing device made by the same company uses 4 grams of copper but requires 5 hours to assemble. 
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The first device has a production cost of $27. 
The second device has a production cost of $32. 
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How much does it cost the company for a gram of this type of copper? 
What is the hourly labor cost at this company? (assuming that production cost is obtained by adding the copper cost and the labor cost)
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5c + 3a = 27
4c + 5a = 32
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Modify:
25c + 15a = 5*27
12c + 15a = 3*32
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Solve for "c"
13c = 39
c = 3 dollars (cost of one gram of copper)
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Cheers,
Stan H.
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