Bar Charts are good at demonstrating several discrete series of similar kind, when the categories are not connected to each other and axes are rotated so the X-Axis becomes vertical and the Y-Axis becomes horizontal. These charts are used for showing some profit by staff, amount of something by place, etc.
This is a 3D Bar Charts of four series and only 3 categories. Each category is a cosmetic product, which was being sold in four regions, which are represented by the series. You can disable and enable the series however you like as the interactive legend is enabled. The maximum value on the "dollar" axis is $12000 and a tick equals $4000 by default (for all 4 series enabled), but it gets automatically adjusted when some of the series are being switched off. Tooltips are formatted to show only the hovered point's data and to be displayed in the exact place according to the point (sticked to the right border of the bar by the left side of a tooltip) by using anchor() and position() methods.