
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 offers two promotions. Promotion A says, "Buy one pair of shoes, get the second pair for half the price." Promotion B offers a more significant discount and says, "Buy one pair of shoes, get $15 off the second pair." Sarah decides to buy two pairs of designer shoes, each originally priced at $50. She can only use one promotion. Sarah wants to maximize her savings. Which promotion should she use, and how many dollars does she save by choosing the better promotion over the other?

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