Review Summary

I am approving your solution because it correctly reads all .population spans, safely converts their comma-formatted text to numbers, and uses them to compute both the total and the rounded average as required. You then update the .total-population and .average-population elements’ textContent with the computed values, formatting them via toLocaleString('en-US') so they match the thousands separators in the source data. This directly satisfies the core functional requirements, including computing the aggregate values and displaying them in place of the original “Calculate it!” text. You also kept your changes scoped to src/scripts/main.js without altering HTML or CSS, which aligns with the task constraints. As a minor, optional improvement, you could add a small guard for the case where there are no .population elements before dividing for the average, but this is not required by the spec. Overall, the implementation is clear, concise, and meets the checklist items for this task.

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