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.
Explain how the nebular hypothesis accounts for why the planetary orbits are all nearly circular. As the planetesimals swept together into protoplanets, their inward and outward motions tended to cancel leaving the protoplanets in mainly round orbits. Explain how the nebular hypothesis accounts for why the planets orbit in the same direction that the sun itself rotates.