To use other Number elements on the page as a source for a Number element
How does it solve user problems?
Number element, by itself, can use one table as a source. Still, if I have multiple Number elements using different tables as a source, it would be helpful to get the sum (or other summary types) of other elements, so there's a grand total of some sort.
How was this validated?
The same idea as how Number elements work, but using other elements as a source rather than a table.
Who is the target audience?
Those who use the Dashboard template on the Interface Designer.