15:15:54 Create new PHPExcel object
15:15:54 Add some data and formulas
15:15:54 Calculated data
Value of A1 [=B1]: 100
Value of B1 [=A1+1]: 100
Value of A2 [=B2+1]: 100
Value of B2 [=A2]: 99
15:15:54 Write to Excel2007 format

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