Find records:
R-54f9831e55af; code=41b3e2bb01c9cc72; value=137
R-173174445fbe; code=d69dabd41a548b76; value=283
R-7a0e3c57b799; code=74946a73b67a69af; value=419
R-9a5cc0ade4f1; code=472ddd6b2ec68c25; value=563
R-e402d3b971a2; code=b07090fe624b8759; value=677
R-33c3e0df01b9; code=c58731c2a91ceee3; value=829

Sum 1,3,6: 137+419+829=1385. R-40fff304245d not present → null.