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ATQ, ?2 - 12.5% of 647.99 = 24.98% × 363.97 + 5% of 1059.98 ?2 ~ (1/8) × 648 + 25% × 364 + 5% × 1060 ?2 ~ 81 + 91 + 53 ?2 ~ 225 ? ~ √225 ~ 15
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