In the example, multiplying $6 by 25 percent gives a weighted-average CMU of $1.50 for Product A. Step 4. Add the weighted-average CMUs of each product together to give the total weighted-average contribution margin or weighted-average ratio for the company's current product mix.
Select the photographs to display the original source in another window. Links to external sites will be displayed in another window. Terrestrial planets have hard surfaces that can be re-shaped by several different processes: impact cratering, volcanism, erosion, and tectonics.
Describe the formation of the Solar System to the students. Show them the pictures of a nebula, flattened planetary disk, and the Sun. The key point is that we do not really know how our Solar System was formed, although most evidence points to the nebula theory. Below is a shorten story of two different ways the Solar System could have formed.