Potash cash operating cost of goods sold net of by-product credits, which we define as total cost of goods sold excluding royalties, depreciation, depletion and amortization, was $199 per short ton in the first quarter of 2010 compared to $238 per short ton in the first quarter of 2009.
Answers.comÂ® is making the world better one answer at a time. It is relativley rare to observe a solar eclipse because the sun's light is blocked by the moon.
Why is a solar eclipse rare? Solar eclipses are rare because the plane of the orbit of the earth around the sun is tilted about 5 degrees to the plane of the orbit of the moon around the earth. Therefore, â¦ at new moon, when the moon comes between the sun and the earth, it almost always is positioned a few degrees above or below the sun, not blocking it.