This area chart displays the cost of sales from 2000 to 2013, using a smooth basis curve for both the line and the filled area beneath it. The visualization loads a CSV dataset via `d3.csv`, parses the year and cost fields, and renders an SVG with `d3.scaleTime`, `d3.scaleLinear`, `d3.axisLeft`, and `d3.axisBottom`. The chart includes customized axis labels and gridlines, with the area filled in yellow and the line drawn in black. The code is built with React and D3 v5.