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.
These circumstellar or protoplanetary disks, as astronomers call them, are the birthplaces of planets. Small clumps of material within a disk stick together to form larger clumps. Eventually these clumps grow to become planets. As a disk spins, the material within it travels around the star in the same direction.