
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
On a journey from the United States to Mexico, Michael took $d$ U.S. dollars. At the border, he exchanged them all, receiving $15$ Mexican pesos for every $5$ U.S. dollars. After spending $75$ Mexican pesos, he had $d$ Mexican pesos left. Express the original amount of U.S. dollars Michael took in terms of $d$ Mexican pesos and determine the sum of the digits of this amount.

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