
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 department store offers two promotions on shoes. Promotion C says, "Buy one pair of shoes at full price and get 20% off the second pair." Promotion D says, "Buy one pair of shoes at full price and get $15 off the second pair." Robert wants to buy two pairs of shoes, each originally priced at $50. He can only use one of the promotions, C or D. Robert aims to use the promotion that results in the higher savings. How much money does Robert save by choosing the better promotion?

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