State Attorney General Kamala Harris has until the end of the week to decide whether to approve the sale of six nonprofit Daughters of Charity hospitals to a for-profit Southern California company that has come under federal investigation for questionable billing practices and has a reputation for slashing services. There's a saying among charitable endeavors: "There's no mission without a margin." Executives of the Catholic hospital chain say they're not only teetering on the edge of bankruptcy, but down to their last Hail Mary pass. And that would be a sale to Prime Healthcare Services.