This dashboard presents four coordinated visualizations of U.S. sales data from a CSV source: a choropleth map, bar chart, scatter plot, and donut chart. The map uses `d3.geoPath` and `d3.geoAlbersUsa` to display state-level sales, while the scatter plot uses `d3.scaleTime`, and the donut chart uses `d3.pie` and `d3.arc`. Animated transitions, via `transition().duration()`, update axes for the scatter plot and bar chart. The visualizations include interactive tooltips and use a CSS grid layout.