The question presented by this appeal is whether the Tax Court correctly decided that, in the case of oil and gas producing properties, “lifting costs,” which constitute a portion of the cost of producing oil and gas, are to be subtracted from gross sales in computing gross income for the purpose of determining whether personal holding company income, as defined in Section 543 of the Internal Revenue Code of 1954, is at least eighty percent of the corporation’s total gross income for the taxable years.

We have carefully considered the unpublished memorandum findings of fact and opinion of the Tax Court and are fully in accord therewith. Based, therefore, on the findings and opinion of the Tax Court, dated February 28, 1968, we affirm the decision of the Tax Court.