This example shows monthly Sales, Profit, and Expenses trends over 160 months using a multi-series area chart with overlaid lines and circles. The chart uses d3.area and d3.line generators to render semi-transparent filled regions and stroke lines, while a d3.scalePoint maps months to x positions. Axes, rotated labels, a legend, and tooltip titles are added via d3-axis and SVG title elements, with data loaded from Sales.csv using d3.csv.