1. You must have multiple phone number fields with one for each phone type, in your export.
  2. Create a Formula such as the following example:
  3. If not isnull({phone number 1.field}) then {phone number 1.field} + ", " + {phone number 2.field} else {phone number 2.field}
  4. Insert a text box where you would like to display the phone numbers
  5. Click and drag your new formula into the text box.