ATQ, 74.99 X 175.01 - 75.12 X 154.98 + (? + 39.98) X 3.98 = (785.01 + 265.01) X 1.99 75 X 175 - 75 X 155 + (? + 40) X 4 ~ (785 + 265) X 2 75 X (175 - 155) + (? + 40) X 4 ~ 1,050 X 2 75 X 20 + (? + 40) X 4 ~ 2,100 (? + 40) X 4 ~ 2,100 - 1,500 (? + 40) X 4 ~ 600 ? + 40 ~ 150 ? ~ 110
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