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【单选题】
Suppose Marv, the owner-manager of Marv’s Hot Dogs, earned $72,000 in revenue last year. Marv’s explicit costs of operation totaled $36,000. Marv has a Bachelor of Science degree in mechanical engineering and could be earning $30,000 annually as mechanical engineer.A.
Marv's implicit cost of using owner-supplied resources is $36,000.
B.
Marv's economic profit is $36,000
C.
Marv’s implicit cost of using owner-supplied resources is $30,000.
D.
Marv's economic profit is $16,000
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