
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A store normally sells windows at $120 each. This week, the store is offering two free windows for every ten windows purchased. Alice needs nine windows, Bob needs eleven windows, and Celina needs ten windows. How much will they save if they purchase the windows together rather than separately?
A) $0
B) $120
C) $240
D) $480
E) $720

Present the answer in LaTex format: \boxed{Your answer}
user