By Milana Vinn (Reuters) -SAP, Europe's largest software provider, offered to buy accounting software firm BlackLine for nearly $4.5 billion in June but was rebuffed and is now considering whether to pursue the company again, according to a copy of the offer letter reviewed by Reuters and a person familiar with the matter. The German software giant, which is working with JPMorgan on the deal, submitted a formal, non-public offer of $66 per share on June 18, but BlackLine wasn't interested in a deal and rejected the advance, according to the letter and person familiar with the talks. The offer represented a 31% premium to the 60-day average price of $50.50. In the offer letter, SAP said it doesn't need outside financing to close the deal. Private equity firm Clearlake Capital holds nearly 9

See Full Page