if it was a tax-free merger, then your basis in the new mutual fund is the tax basis you had in the old fund + the tax basis of shares acquired after the merger.
They exited the old fund at $59.82 per share, exchanged for $29.57 per share into the new fund. This could be irrelevant. example say you had 100 shares of the old fund value at $5982.00 what you should have gotten is 202.30 shares of the new fund times $29.57= $5982.01 that .3 share might have been redeemed since many mergers provide no fractional shares will be issued.
if it was a fully taxable merger based on the example, the sale price back in 2017 would have been $5982 vs your cost in the old fund. the basis in the new fund would have been $5982
or it could have been a part taxable/tax-free merger
the best place to get more info is to contact the new fund. you should have gotten documentation before the merger which would have included a discussion of the tax consequences.. you may even be bale to find info on its website
