NATIONAL CAPITAL <NCETS> TO MAKE SALE National Capital Real Estate Trust said it has entered into a definitive agreement to sell its Irvine Commercial Center in Irvine, Calif., to Shuwa Corp of California for 10.85 mln dlrs. It said the buyer has pl;aced 250,000 dlrs into an escrow account as a nonrefundable deposit. The trust said existing debt secured by the property of about 6,700,000 dlrs in due on completion of the transaction, which is expected in early April.