I assume your confusion is with the 75k vs 100k & not the 49.7%?
I thought up until an hour ago my loss in 1 account was $700 LESS than what the fund said. I checked the spreadsheet I created and found an error I made in summing a column! After correction, my loss matched to the penny what they said. Note that my spreadsheet is not what the fund used. I sent them statements with non-OWCP data redacted & they did the calcs.
Did you factor in the .39 cents base? Like if you paid $1.00 per share, subject .39 & your cost basis becomes .61 cents as far as the fund is concerned.
I recall the .39 changed for some dates too but I'm too lazy to pull the paperwork out!
I also found it a bit confusing for shares purchased before the start of the period but sold during it?