As in each table can seat 8 people and the probability you need to find is about the first person you can ignore this data.
Probability that the first person to enter the room will be randomly seated at a maple table:

#maple tables: 9
# total tables: 9 +10 +5 +7=31

Then, the probability that the first person to enter the room will be randomly seated at a maple table is 9/31
7.855 mm maybe the answer unless rounded to the tenths place to be 7.9 mm.
Answer:
125$ worth because you would not spend it all if you picked 625 and the others would give way too many away