SOLUTION: A firm sells its product for R200 per unit. The cost per unit (per month) is 80 + x , where x represents the number of units sold per month. What is the marginal profit at a produc

Question 1091954: A firm sells its product for R200 per unit. The cost per unit (per month) is 80 + x , where x represents the number of units sold per month. What is the marginal profit at a production level of 20 units?
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.
The first part of the condition

     A firm sells its product for R200 per unit. The cost per unit (per month) is 80 + x , where x represents the number of units sold per month.

says about units per month.

The question

     What is the marginal profit at a production level of 20 units?

tells about units, but not about "units per month"   (as it should be).

==============>   It is not a way to formulate Math problem.

Math problems are not "playing words".
Math problems use precise formulations, that do not leave the room for questions "What is it ?"   or   "What does it mean ?"

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