When we're talking about the gain or loss of the sale of an asset we need to be looking at net book value at the time of the sale. You will need to allocate the amount reflected on form 8594 among all the assets.A typical method is to allocate the proceeds based on the original cost. Consult the table in the following section for a list of specific assets typically categorized as real or personal property. The gain or loss on each asset is figured separately. The sale of capital assets results in capital gain or loss. Generally, gain from the sale or exchange of a capital asset held for personal use is a capital gain. According to the​ Schedule D instructions: