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Extracted text: From the differential leveling notes shown, calculate the sum of x, y, and z. STATIONS B.S. Н.I. F.S. ELEVATION BM1 5.87 398.12 392.25 1 7.03 398.86 6.29 391.83 2 Y 6.25 392.61 3 7.25 396.26 7.08 4 10.19 400.88 5.57 390.69 5 9.29 405.72 4.45 396.43 BM2 4.94 400.78