Hi Khanya,
The blue text in cases means that the interviewer will provide this information.
We are told that the percentage of men between 30 and 60 who buy magazines is 10%.
This is our target market, as indicated in the initial prompt "the CEO is thinking about starting a third monthly magazine that is targeted towards 30 to 60-year-old men in the US"
Very important point here: When going through a case, always keep the objective/context top of mind.