Gain or loss depends on how I allocate the sale price of $400,000 amongst the 55 assets.

some are sitting on the books fully depreciated from 30 years ago. I have no idea how I should allocate amongst the 55 assets. My assumption would be pro-rata but the newer assets not fully depreciated are definitely worth more. total assets on the books are $817k depreciation is $763k. Sold for $400k.

I have gotten myself so totally immersed in this situation that I have confused my brain to the point I am unsure of everything.

I just want to make sure they pay the proper tax but not overpay due to my not understanding how the tax software is handling something like this.