This example visualizes January coffee sales as a bar chart, displaying total records, total units sold, and average price in a text summary above the chart. The bar chart uses d3.scaleBand and d3.scaleLinear to map product names to unit counts, with axes created via d3.axisBottom and d3.axisLeft. Data is loaded asynchronously from a CSV file using d3.csv, and hover interactions change bar color. The visualization is rendered as SVG with D3 v7.