This bar chart visualizes total sales by product, aggregating a CSV dataset loaded from a GitHub Gist and displaying each product’s summed revenue as a horizontal bar. Product E leads in sales, while Product D records the lowest total. The visualization uses D3.js APIs such as `d3.csv`, `d3.rollups`, `d3.sum`, and `scaleBand`/`scaleLinear` to compute and sort the aggregates, render the SVG bars, and append axes, labels, and a title, with hover effects changing bar color to orange.