ACTON <ATN> TO SELL UNIT FOR GAIN Acton Corp said it has agreed to sell its five Michigan cable television systems to Wisconsin Cablevision Inc for about 9,500,000 dlrs, resulting in a gain of about six mln dlrs. The company said the sale is subject to review by local authorities. The systems have about 7,500 subscribers. Acton said proceeds will be used to retire bank debt. The company said it has also entered into a 15.5 mln dlr bank credit agreement that will allow it to complete the prepayment of all its obligations to members of its present bank syndicate. The company said the new credit will also allow it to prepay some other debt and redeem its Class C Series Two preferred stock. It said the new facility has allowed it to take full advantage of an early payment discount of about 13 mln dlrs in principal and interest which was negotiated with its banking syndicate in connection with an April 1986 financial restructuring.