
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
Alan, Beth, and Chris went on a camping trip and decided to share the expenses equally. Alan paid $110, Beth paid $140, and Chris paid $190. To equalize the cost, Alan gave Chris $a$ dollars and Beth gave Chris $b$ dollars after realizing they had forgotten to split the cost of a $60 picnic they also enjoyed. What is $a-b$?

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