The booth made $50 x 3 = $<<50*3=150>>150 selling cotton candy each day.
In a day, the booth made a total of $150 + $50 = $<<150+50=200>>200.
In 5 days, they made a total of $200 x 5 = $<<200*5=1000>>1000.
The booth has to pay a total of $30 + $75 = $<<30+75=105>>105.
Thus, the booth earned $1000 - $105 = $<<1000-105=895>>895.
#### 895