Nine adults went to a play with seven children. Adult tickets are $11 each and children's tickets are $7 each. How many dollars more did the adults' tickets cost in total than the children's tickets in total?
Adults = 9 * 11 = <<9*11=99>>99
Children = 7 * 7 = <<7*7=49>>49
Difference: 99 - 49 = $<<99-49=50>>50
The adults' tickets cost $50 more than the children's tickets.
#### 50