Cost Explorer

The Cost Explorer screen is displays high level cost trends for the entire Space.
The date range control at the top-right allows you to adjust the date range of the chart:

The first expenses tile at the top-left shows total costs for the selected date range:

The second tile (above) shows the total expenses for the same number of days that adjacently precede the selected date range.
The chart can be configured to display costs aggregated by day, week or month.
The View By control allows to you switch to a categorized breakdown by data source, pool or owner. The Region option here will switch to the Cost Map screen.
Clicking on a datapoint of the chart will switch to the Resources cost screen, pre-filtered on the date range for the datapoint, and for the categorized views, filtered on the category (e.g. pool, owner).