Here is how that works.
As you know, there are multiple input groups. Each of those groups is organized with subgroups within it. On the right side of the Calculator screen, you will see a bar graph that displays the % of the total carbon load of each of the subsections in relation to the total input group with a colored column for each subsection. Below the bar graph, you will see the input group's total carbon pounds (the sum of all the subgroups) and the % of the total emissions for that input.

Recap

Bar Chart = % carbon of subgroup as related to the input group “Carbon”.

Carbon = pounds of carbon for that line item.

Carbon % = % of carbon within the subsection of that input group.