This bar chart displays total product sales in USD, aggregated from a CSV dataset loaded via `d3.csv`. It shows that Product E has the highest revenue while Product D has the lowest, with bars sorted in descending order. Using D3 v6, the visualization applies `d3.rollups` and `d3.sum` to aggregate data, then renders SVG bar charts with `d3.scaleBand`, `d3.scaleLinear`, and `d3.axisLeft`/`d3.axisBottom`. Interactive hover effects change bar color via CSS.