
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
Hexadecimal (base-16) numbers use digits $0$ through $9$ and letters $A$ through $F$ for $10$ through $15$. In the first $500$ positive integers, find how many have a hexadecimal representation consisting only of numeric digits $0$ through $9$. What is the sum of the digits of this count?
A) 17
B) 18
C) 19
D) 20
E) 21

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