Assume the following $(1)$ sales $=$ $$200,000,(2)$ unit sales $=10,000,(3)$ the contribution margin ratio $=25\%,$ and $(4)$ net operating income $=$ $$10,000.$ Given these four assumptions, which of the following is true?

Multiple Choice

The total fixed expenses $=$ $$150,000$

The variable expense ratio is $300\%$

The total contribution margin $=$ $$40,000$

The break$-$even point is $8,000$ units