I am using Manhattan Advanced GMAT Quant, PDF version without the publisher’s imprint.
Anyway, it is on the 8th page of the 5th Chapter. I’ve read the whole chapter, but this is only an example of a GMAT-like trap, rather out of context.
I’ve done all the Manhattan Math Guides and I am used to and comfortable with the fact that Manhattan Guys make errors very, very, VERY occasionally. Therefore I wanted to confront this example with your opinion.
I am not GMAT expert, but I would like to agree with
jumsumtak, that “a negative profit” should be called “a loss”. I uphold my mind that “a negative profit” is oxymoron, thus illegal.