This fork of an ICE-7 area chart visualizes the yearly increase in sales costs. The SVG-based chart uses a smooth, curved area to show the upward trend over time, with labeled axes for year and cost. The code leverages D3 v5’s `area` generator with a `curveBasis` interpolation, along with `scaleTime` and `scaleLinear` for axes. Data is loaded from an external CSV file via `d3.csv`, with years parsed as dates and costs as numbers before rendering.