add task solution

[NeustrVk]

DEMO LINK

[mateacademy-ai-mentor]

Review Summary

Your solution correctly implements all the required functionality. The code successfully parses population data from DOM elements, converts strings to numbers while handling comma formatting, calculates both average and total values, and updates the target spans with properly formatted output using thousands separators. All checklist items pass and there are no critical issues. The implementation is clean and functional.

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