Answer:
$1,200
Step-by-step explanation:
Add: 100+30=130
Subtract: 130-10= 120
Multiply: 120*10= $1,200
Answer:$1,200
She had 100 at the beginning, 30 more join. That's 130 people, but 10 cancelled so now she's left with 120 people. 120 people paying 10 dollars is $1,200
