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.
Orbits are elliptical when any of the following things happen: 1  Another object strikes the planet in such a way to change its orbit. It would have to be massive compared to the primary object, at least a sizable fraction. 2  Gravitational interaction with other nearby objects, especially if resonance occurs.