Hi There. I am Bing and I look forward to helping you with your issue today.
Basically, there is no calculation in the given formula, it is just a reference to ranges in another worksheet named "Implemented Data".
Therefore you need to check the worksheet "Implemented Data" for the particular formula, if the given ranges there are not another reference.
FYI - Create or change a cell reference
Does it make sense for you?
BTW, if the given worksheet can't be found by default, I think your Excel will prompt a File dialogue box to ask you locate the particular worksheet.
Basically, yes. they are references to data source.
As shown in the attached screenshot of the "Total Open" sheet in your workbook, see the formula line, they are references to ranges in the same worksheet, specifically from a pivot table giving the data source. I believe it may well explain what I mean. :)
Probably the highlighted version can explain that better, see below. Just hope it helps.
Is there anything else that I could help with please?