How can I write a calculation to default to one of the following? basically if the phone number option 1 is null then check the second option and so on until one of the following displays a phone number.
${NEOFormPHONENUMBER}
${NEOFormMOBILENUMBER}
${NEOFormBUSINESSNUMBER}
${NEOFormEMERGENCYCONTACTNAME}
${NEOFormEMERGENCYNUMBER}