This example shows the total purchase stock-in values for inventory products as a filled area chart, with product IDs displayed along the x-axis. The chart uses d3.area() to generate the area path and d3.scaleLinear() for both axes, rendering in SVG. Data is loaded asynchronously from a CSV file, and x-axis labels are rotated to prevent overlap. The visualization relies on d3.axisBottom and d3.axisLeft to create the tick marks and labels.