Area Chart Activity 8
This area chart visualizes the cost of sales from 2000 to 2013, using a time-scaled x-axis and a linear y-axis. The chart is rendered as SVG with D3 v5, leveraging `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, `line`, and `area` generators. Data is loaded from a CSV file, parsed, and drawn with smoothed curves, with axis labels and tick formatting customized via `format`.