Short term transaction for which basis is missing & not reported to IRS

Working on my 2024 taxes, I have a 1099-B for iShares gold ETF with 1c completed but no 1b or 1e info.  The 12 transactions total $50 but TT won't let me input zero or dash signs in those boxes.  The broker says to contact a tax expert, for $50 income???  Broker said it was a "WHIST" transaction? Thanks for your help.