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ATQ,
Number of mobile phones manufactured = 20000 X 0.30 = 6000
Number of mobile phones sold = 6000 X 0.85 = 5100
Number of accessories manufactured = 20000 - 6000 = 14000
Number of accessories sold = 14000 X 0.40 = 5600
So, total number of units sold = 5100 + 5600 = 10700
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