$\"\"$

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The functions are $\"\"$ and $\"\"$ .

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Where $\"\"$ represents company cost,

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$\"\"$ represents the companys revenue and

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$\"\"$ represnts the no.of untis produced and sold in a day.

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(a).

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Find $\"\"$ value when $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in the function $\"\"$ .

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$\"\"$

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The break even point occurs when the company sells $\"\"$ units.

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$\"\"$

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(b)

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Find the value of $\"\"$ when $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in the function $\"\"$ .

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$\"\"$

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The company makes profit when it sells more than $\"\"$ units..

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$\"\"$

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(a) The break even point occurs when $\"\"$ units.

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(b) The company makes profit when $\"\"$ units.