Question 1125568
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I'd like to make one notice, which does not relate to Math.


It relates to using terminology.


In this problem, you incorrectly use the term "revenue". 


The revenue is the product of the price and the number of items sold.


It can be equal to zero if and only if at least one of these factors is zero.


The number of items sold is zero ?   - Absurd.


The price is zero ?  - Absurd, too.


So, the formulation in the post MAKES NO SENSE due to incorrect using of terminology.


Actually, what you call a "revenue" is a "profit, instead.
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