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.
Planets' Wobbles. The conventional theory is that climate changes on Mars can be explained primarily by small alterations in the planet's orbit and tilt, not by changes in the sun. Wobbles in the orbit of Mars are the main cause of its climate change in the current era, Oxford's Wilson explained.