This pie chart visualizes the distribution of net quantities across product types from a business sales dataset. It shows the proportion each product contributes as colored slices, with a tooltip revealing exact percentages on hover and a legend identifying categories. Built with D3.js v7, the chart uses `d3.pie` and `d3.arc` to generate SVG paths, `d3.rollup` to aggregate the CSV data, and a sequential color scale for slice fills.