
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
Dave and Doug need a total of 15 windows. If they purchase the windows together, they get two free windows. If they purchase the windows separately, Dave gets one free window and Doug gets one free window. How many dollars will they save if they purchase the windows together rather than separately?

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