A dance troupe has a total of 50 dancers split into 2 groups. The costumes worn by Group A cost $80 each, and those worn by Group B cost $90 each. If the total cost of all the costumes is $4,270, what is the total cost of the costumes worn by Group B?
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A$1,840
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B$2,070
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C$2,135
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D$2,160
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E$2,430
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正确答案: E