Question: David produces "For Sale" signs for property sales and shows the follow data for the past year: The company so

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Question:
David produces "For Sale" signs for property sales and shows the
follow data for the past year:
The company sold 150 signs during the year.
Required:
Using cost-volume-profit analysis, answer the following
questions.
What is the company's contribution margin ratio?
What is the company's breakeven point in signs?
How many signs would the company have to sell to attain a target
operating income of $210?
What is the company's margin of safety in in units for
signs?
What is the company's degree of operating leverage?
Round to 2 decimal places.