Essentia Health is re-examining its pricing for heart surgery, an extremely lucrative service for most hospitals. Heart valve replacement surgery typically costs $80,000-$200,000 on a national basis. Essentia has been charging an average of $95,000 and has decided it can increase its average price to $105,000. If Essentia did 300 of these procedures last year and is expecting this to increase by 20% in 2021, how much would its total revenue change for this service in 2021?

1. 20%

2. 50%

3. 33% (CORRECT ANSWER)

4. 10.5%

The answer is 33%, but I can't seem to figure out how that is correct. Please show work.