Billionaire Laurene Powell Jobs has purchased a mansion for around $70 million in the Pacific Heights neighborhood of San Fransisco — a record price for a home in the city, The Wall Street Journal reported, citing unnamed people familiar with the transaction. Powell Jobs, the founder of impact investing and philanthropy firm the Emerson Collective and the widow of Apple founder Steve Jobs, bought the property in an off-market deal from Sloan Lindemann Barnett and Roger Barnett, the CEO of natural nutrition company Shaklee Corp.