This example presents two SVG charts built with D3.js v7 to visualize a multi-value time-series dataset containing daily sales, profit, and expenses. Chart 1 is a multi-series line chart with three colored lines and an interactive tooltip, while Chart 2 combines bars (sales) with an overlaid line (profit) on a shared axis. Both charts use `d3.csv`, `d3.scaleUtc`, `d3.scaleBand`, `d3.scaleLinear`, `d3.line`, and `d3.axisBottom`/`d3.axisLeft` for rendering. The data is loaded from a local CSV file.