What is the mean of the following salaries: $60,000, $13,000, $25,000, and $40,000?

To calculate the mean of the salaries provided, you need to add all the salaries together and then divide the total by the number of salaries.

First, sum the salaries:

$60,000 + $13,000 + $25,000 + $40,000 = $138,000.

Next, since there are four salaries, you divide the total by 4:

$138,000 ÷ 4 = $34,500.

This value represents the average salary among the numbers given. Thus, choosing $34,500 per year as the answer accurately reflects the mean calculated from the provided salaries.