
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 usually sells tiles at $150 each. This week, the store is offering two free tiles for every nine purchased. Dave needs eleven tiles, and Doug needs thirteen tiles. How much will they save if they purchase tiles together rather than separately?
$(\mathrm{A}) \ 300 \qquad (\mathrm{B}) \ 450 \qquad (\mathrm{C})\ 600 \qquad (\mathrm{D}) \ 750 \qquad (\mathrm{E})\ 900$

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