
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
Every month, Lisa spends part of her stipend on a book and a coffee. This month, Lisa's stipend was \( B \) dollars. The cost of her book was \( 30\% \) of the difference between \( B \) and twice the cost of her coffee, while the cost of her coffee was \( 10\% \) of the difference between \( B \) and the cost of her book. What fraction of \( B \) did Lisa pay for her book and coffee combined?
A) 25%
B) 28%
C) 31%
D) 33%

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