MGM Agrees to Be Bought for \$12/Share  LOS ANGELES (Reuters) - Film and television studio  Metro-Goldwyn-Mayer Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MGM.N target=/stocks/quickinfo/fullquote"&gt;MGM.N&lt;/A&gt; on Monday said it agreed in  principle to be acquired by a consortium led by Sony Corp. of  America for \$12 a share in cash, plus assumed debt.