Answer:
3 more guests
Explanation:
You just to have to add 120 plus 30 until you reach 200.
120+30=150
150+30=180
180+NO it is going to be too much.30=210
Then if you see I did 180+30 it gave me more than 200 but they only have the budget of 200. So you will have $10 extra. ANd then you can only invite 3 more guest.