JetStream Manufacturing's contribution format income statement for the most recent month is shown below for $10,000$ sales units.

What would be the revised net operating income per month if the sales volume increases by $200$ units?

Note: Please be sure to adhere to the instructions for numerical responses. If your response reflects negative net operating income $($i$.$e$.,$ loss$),$ please include a minus sign

before the number. For instance, if NOI is $-$$$100,$ kindly enter it as $-100\mathrm{.}00$

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Last month when Kaali Manufacturing sold $50,000$ units, total sales were $$400,000,$ total variable expenses were $$100,000,$ and fixed expense

What is the company's contribution margin $($CM$)$ ratio?

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