I tried different possibilities to combine the following conditions:
condition 1: state (column D) 'vrijgegeven' has to be true
condition 2: 'vrijgegeven' has to be done between 1-1-2015 en 31-12-2015 (column C)
condition 3: If number in column A appears more than one time then condition 4 has to be activated
condition 4: if date in 'selectie start' (column B) is between now and 1-12-2015 and the number in column A appears more then one time the answer in column I is: 'reminder' otherwise: 'geen reminder'
At this moment I can only get a formule that gives me an answer in the corresponding row without looking to the rows from the same number (column A). So condition 4 is my biggest problem.
Can anyone help me with this case?
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