Final answer:
The movie theatre will make $5000 if it charges $5 per ticket and all students and professors will purchase tickets. The consumer excess for students is $2 and for professors is $7. If the theatre charges $10 per ticket, only the professors will purchase tickets, resulting in $1000 profit and a consumer excess of $7 for each professor.
Step-by-step explanation:
In this scenario, we have 900 students and 100 professors who are potential customers of the Collegetown movie theatre. If the theatre charges $5 per ticket, all the students and professors will purchase tickets. The movie theatre will make $5 x 1000 = $5000. The consumer excess in this case is the difference between the amount each person is willing to pay and the price they actually pay. For students, it is $5 - $3 = $2, and for professors, it is $10 - $3 = $7.
If the theatre charges $10 per ticket, only the professors will purchase tickets. Therefore, the movie theatre will make $10 x 100 = $1000. The consumer excess in this case is $10 - $3 = $7 for each professor.
If the theatre charges $10 for professors and $5 for students, only the professors and students with valid student IDs will purchase tickets. Let's assume that half of the students have valid IDs, so 450 students and 100 professors will purchase tickets. The movie theatre will make $10 x 100 + $5 x 450 = $5500. The consumer excess for students is $5 - $3 = $2, and for professors, it is $10 - $3 = $7.