This area chart visualizes the cost of sales from 2000 to 2013 using D3 v5. The SVG rendering displays a smoothed line over a light-green area, with red tick labels and an orange axis label. The code uses `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, `d3.line`, `d3.area`, and `d3.curveBasis` to generate the chart. Data is loaded from a CSV file via `d3.csv`, with the year parsed as a date and cost as a number.