1A. Please describe different types of costs based on they behave and provide a few examples of those costs.

1B. Please explain how the contribution margin is calculated. Then, conduct google research on "contribution margin" and copy & paste it into your post. Providing a link won't be sufficient.

1C. Please explain what the break-even point means. Then, conduct google research on "contribution margin" and copy & paste it into your post. Providing a link won't be sufficient.