This stacked bar chart visualizes quarterly sales across four product categories—Electronics, Clothing, Furniture, and Books—with each bar segment colored according to category and overall height reflecting total quarterly revenue. The visualization loads data from a CSV file using `d3.csv`, then applies `d3.stack()` to compute cumulative segment values, `d3.scaleBand()` for quarter positioning, `d3.scaleLinear()` for the y-axis, and `d3.scaleOrdinal()` for categorical colors. Axes are rendered with `d3.axisBottom` and `d3.axisLeft`, while SVG rectangles represent each stacked segment, and a bold "Total Sales" label marks the highest y-value.