Use the stem-and-leaf plot of Monthly Sales Goals to answer the question that follows.

Monthly Sales Goals (in thousands)
Stem Leaf
2 1 2
3 5 5 6 8
4 1 7 8 8
5 4 5


What is the mean monthly sales goal?

$40,000

$35,000

$39,500

$48,000

I don't know how to even start this problem.Help please?