Σ Summation information on Volume Profile

When I run volume profile on individual bars, or a span of bars, I get a Σ summation of the contents for that volume profile that displays two numerical values, but I do not understand what the numbers are telling me. An example of the summation is:
Σ 648 / 1.75
Please explain these numbers. Thank you in advance for any help.

The Σ line is the profile summary. For a Volume profile, 648 is the total volume in the selected profile and 1.75 is its high-to-low price range if Summary display unit is set to Price. It is not a second volume value. You can check it by comparing the highest and lowest prices covered by that profile; their difference should be 1.75. In the indicator or drawing tool properties, look under Label > Show profile summary and Summary display unit. The second number can instead be shown in ticks, percent, currency or pips. If the high-to-low difference does not match, which Profile type and Summary display unit are selected on your chart?

Great answer. Thank you for your help.