A $29K error would be over $200K of pre-tax RSUs. I had to work it out in Sheets to be sure as the number was higher than I thought (and definitely in the ballpark of your figure, so this is a "you're right" reply not a "no, but" reply.
I assumed in Sheets (arbitrarily) one grant, 10% CAGR on share price, annual vesting, and selling the whole grant in year 4 (so years 1-3 growth are LTCG and year 4 is no growth after vest).
150k of miscalculated basis would be about 250k of pre-tax RSUs, which is the ballpark I was vaguely thinking of.