Stereo Sound Unlimited has a monopoly over the installation of surround sound systems. If Stereo Sound Unlimited's total revenue from installing 10 sound systems is $20,000 and its total revenue from installing 11 sound systems is $18,000, what is the marginal revenue of the eleventh sound system?
A. -$2,000
B. -$1,000
C. $2,000
D. $3,800
Answer: A
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What will be an ideal response?
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ATMs and human bank tellers:
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