Answer

1. Go to Analysis > Create Calculated Field. Name the field First Order Date, enter the following formula, then click OK:
   {FIXED [Customer Name] : MIN([Order Date])}
2. Create another calculated field named First Purchased Product, enter the following formula, then click OK:
   { FIXED [Customer Name]: 
MIN(IF [First Order Date] = [Order Date]
THEN [Product Name] END)}
3. Place Customer Name, First Order Date and Order Date on Rows.
4. Place First Purchased Product on Text.