Doiko Corporation owns 90%of the stock in Nall, Inc. Trebor owns 40%of the stock of Doiko. Trebor's sister owns the remaining 60% of Doiko. During the current year, Trebor purchased land from Nall for $43,000. Nall had purchased the land for $62,000. Write a memorandum to the controller of Nall, Inc., explaining the potential tax problem with the sale of the land to Trebor.