If the team decides to set a new goal of $5000, what is the least
amount of seats the team needs to sell in order to reach their
goal? If the team decides to set a new goal of $5000, what is the least
amount of seats the team needs to sell in order to reach their
goal?

You will need to use your cost per ticket and divide it into 5000

If there is a structure price ie) adult child or season etc you can graph the rate of increase price from eg) £20-£15 = $5 and decide that more adult seats are purchased at 1:4 ratio or 2:3 ratio and for 1:4 ratio you first divide 4000/20 and then any remainder add to the division of child seats divide 1000/15 and use remainder or count back one seat for adult until maximum seats are filled wth 5000 used.  

Step-by-step explanation:

Showing a rate of increase =m

Showing a number of people = p

Showing a number of seats = x