This fork of ICE-6 combines bar and line series to compare monthly sales and profit data loaded from a CSV file. Bars encode sales values while a monotone-curved line shows profit, with both sharing a linear y-scale and band x-scale. The D3 v7 chart includes gridlines, axis labels, a legend, and interactive tooltips on bars and points. SVG rendering is used throughout, leveraging `d3.csv`, `d3.scaleBand`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, `d3.line`, and event handlers for mouse and keyboard accessibility.