? = (25% of 20% of 800) × 8 – 25% of 260
ATQ, ? = (25% of 20% of 800) × 8 – 25% of 260 ? = (0.25 × 0.20 × 800) × 8 – 0.25 × 260 ? = 40 × 8 – 65 ? = 320 – 65 ? = 255
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