Need to take result values in 2 OBX05 fields and concatenate to the OBX04.

Softbank to Epic BPAM – ORU^R01 – taking the value of OBX05, if OBX03.1 is UNITN and taking the value of OBX05, if OBX03.1 is UNPRD, then take the two results and concatenate to the OBX04 field.

How would I go about checking the segments for the 2 result values needed,  concatenate the values and then make sure they are valued in OBX04 for each segment in that grouping?

Here is what the end result should look like.

Group one

OBX|1|ST|UTYPE^HUMAN READABLE UNIT ABO^SOFTLRR^^^LN| W036311000001- E0336V00|O||||||P|||201911141416||BCH1

OBX|2|ST|URH^HUMAN READABLE UNIT RH^SOFTLRR^^^LN| W036311000001- E0336V00|NEG||||||P|||201911141416||BCH1

OBX|3|ST|UPROD^HUMAN READABLE PRODUCT CODE^SOFTLRR^^^LN| W036311000001- E0336V00|E0336V00||||||P|||201911141416||BCH1

OBX|4|ST|UNITN^UNIT #^SOFTLRR^^^LN| W036311000001- E0336V00|W036311000001||||||P|||201911141416||BCH1

OBX|5|ST|USTAT^UNIT STATUS^SOFTLRR^^^LN| W036311000001– E0336V00|selected||||||P|||201911141416||BCH1

OBX|6|ST|UBPRD^BARCODED PRODUCT CODE^SOFTLRR^^^LN| W036311000001- E0336V00|E0336V00||||||P|||201911141416||BCH1

OBX|7|ST|UBTYP^BARCODED ABORH^SOFTLRR^^^LN| W036311000001- E0336V00|=%9500||||||P|||201911141416||BCH1

OBX|8|ST|UEXP^UNIT EXPIRATION^SOFTLRR^^^LN| W036311000001- E0336V00|201911302359||||||P|||201911141416||BCH1

Group two

OBX|9|ST|UTYPE^HUMAN READABLE UNIT ABO^SOFTLRR^^^LN| W036399111822- E0224V00|O||||||P|||201911201114||CGP1

OBX|10|ST|URH^HUMAN READABLE UNIT RH^SOFTLRR^^^LN| W036399111822- E0224V00|NEG||||||P|||201911201114||CGP1

OBX|11|ST|UPROD^HUMAN READABLE PRODUCT CODE^SOFTLRR^^^LN| W036399111822- E0224V00|R12||||||P|||201911201114||CGP1

OBX|12|ST|UNITN^UNIT #^SOFTLRR^^^LN| W036399111822- E0224V00|W036399111822||||||P|||201911201114||CGP1

OBX|13|ST|USTAT^UNIT STATUS^SOFTLRR^^^LN| W036399111822- E0224V00|selected||||||P|||201911201114||CGP1

OBX|14|ST|UBPRD^BARCODED PRODUCT CODE^SOFTLRR^^^LN| W036399111822- E0224V00|E0224V00||||||P|||201911201114||CGP1

OBX|15|ST|UBTYP^BARCODED ABORH^SOFTLRR^^^LN| W036399111822- E0224V00|=%9500||||||P|||201911201114||CGP1

OBX|16|ST|UEXP^UNIT EXPIRATION^SOFTLRR^^^LN| W036399111822- E0224V00|201912152359||||||P|||201911201114||CGP1