By Jan Schwartz HAMBURG (Reuters) -Volkswagen will price preferred shares in the planned flotation of Porsche AG at 76.50 euros to 82.50 euros ($76.61 to $82.62) per share, the carmaker said on Sunday, for proceeds of 8.7 billion to 9.4 billion euros. The price range, which translates into a valuation of 70-75 billion euros, would make it Germany’s second biggest initial public offering ever and, at the upper end of the valuation, Europe’s third largest on record, according to Refinitiv data. Trading will begin on the Frankfurt Stock Exchange on Sept. 29, the carmaker said. Up to 113,875,000 p…