Can you give me some step-by-step instructions for this math problem: A dance studio offers lessons to students. It costs $25 per session to rent the studio plus $1.50 per student per session. At present, the dance studio has 10 students and is rented 3 days a week. How much are the expected earnings of the dance studio in a month?
The total earnings from 10 students is $1.50 x 10 = $15 per session.
So the total earnings per session is $15 + $25 = $40.
Thus, every week the dance studio earns $40 x 3 = $120.
Therefore, it will earn $120 x 4 = $480 in a month.