
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
David compares the price of a new smartphone at two different stores. Store C offers 10% off the sticker price followed by a $100 rebate, and store D offers 20% off the same sticker price with no rebate. David saves $20 by buying the smartphone at store C instead of store D. What is the sticker price of the smartphone, in dollars?
A) $700$
B) $750$
C) $800$
D) $850$
E) $900$

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