How to display total size / duration of a List?

Is there currently a way to display the total size (file size) and total accumulative sample time for a List?

The List view currently shows each individual file’s size and each individual file’s duration - but I want a way to see the Total of all files in a particular List. This would be super helpful, for example, when making up Sample libraries for instruments that have limited resources (like Novation Circuit). Just throw the totals in the header where currently the total # of items is displayed along with last modification date - like this: