diff --git a/BACKUP/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx b/BACKUP/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx
new file mode 100644
index 0000000..7eaff75
Binary files /dev/null and b/BACKUP/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx differ
diff --git a/BoM/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx b/BoM/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx
index 6de1e08..7eaff75 100644
Binary files a/BoM/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx and b/BoM/Axio4_Nexio_Conduent Subsystem Cost Analysis.xlsx differ
diff --git a/octo_fill.py b/octo_fill.py
index 4f82a08..3a4a753 100644
--- a/octo_fill.py
+++ b/octo_fill.py
@@ -46,7 +46,7 @@ COST_HEADER = "Unit Cost EUR @1000"
 SKIP_MPNS = {
     "", "0", "tbd", "n/a", "na", "-", "--", "---", "?", "none",
     "null", "nan", "xxx", "x", "dnf", "dnp", "do not fit",
-    "do not populate",
+    "do not populate", "total",
 }
 
 logging.basicConfig(
@@ -199,7 +199,10 @@ def _find_tables(indexed_rows: list[tuple[int, tuple]]):
                     continue
                 empty_streak = 0
 
-                if mfr.lower() == "manufacturer" and mpn.lower() == "mpn":
+                # Detect a new table header anywhere in the row (handles sub-tables
+                # at different column positions than the current table)
+                dr_str_lower = [_cell(v).lower() for v in dr]
+                if "manufacturer" in dr_str_lower and "mpn" in dr_str_lower:
                     break
 
                 if mpn and mpn.lower() not in SKIP_MPNS:
@@ -237,7 +240,10 @@ def fill_boms(
     for f in files:
         log.info(f"Processing  {f.name}")
         try:
-            wb = openpyxl.load_workbook(f)
+            # data_only gives us resolved cell values (not formula strings) for
+            # table/part detection; the writable wb is used for reading/writing prices.
+            wb_ro = openpyxl.load_workbook(f, data_only=True, read_only=True)
+            wb    = openpyxl.load_workbook(f)
         except Exception as exc:
             log.error(f"  Cannot open {f.name}: {exc}")
             continue
@@ -246,14 +252,19 @@ def fill_boms(
             ws = wb[sheet_name]
             indexed = [
                 (i, tuple(row))
-                for i, row in enumerate(ws.iter_rows(values_only=True), start=1)
+                for i, row in enumerate(wb_ro[sheet_name].iter_rows(values_only=True), start=1)
             ]
 
             for table in _find_tables(indexed):
                 header_row = table["header_row"]
+                data_rows = [r for r, _, _ in table["data"]]
+                row_range = (
+                    f" (Excel rows {data_rows[0]}–{data_rows[-1]})"
+                    if data_rows else " (no data rows detected)"
+                )
                 log.info(
                     f"  Sheet '{sheet_name}' row {header_row}: "
-                    f"table at col {table['start_col']}, {len(table['data'])} parts"
+                    f"table at col {table['start_col']}, {len(table['data'])} parts{row_range}"
                 )
 
                 # Find or create the cost column.
@@ -272,8 +283,11 @@ def fill_boms(
                 for c in range(table["start_col"], max_col + 1):
                     val = ws.cell(header_row, c).value
                     if val is not None:
-                        last_used = c
-                        if str(val).strip().lower() in KNOWN_COST_HEADERS:
+                        val_str = str(val).strip()
+                        # Don't count formula placeholders as "used" columns
+                        if not val_str.startswith("="):
+                            last_used = c
+                        if val_str.lower() in KNOWN_COST_HEADERS:
                             cost_col = c
                             break
 
@@ -288,7 +302,14 @@ def fill_boms(
                     if isinstance(cell, MergedCell):
                         continue
                     existing = cell.value
-                    if existing is not None and str(existing).strip() not in ("", "0") and existing != 0:
+                    is_formula = isinstance(existing, str) and existing.startswith("=")
+                    is_empty   = (
+                        existing is None
+                        or (isinstance(existing, str) and existing.strip() in ("", "0"))
+                        or (isinstance(existing, (int, float)) and existing == 0)
+                    )
+                    if not is_empty and not is_formula:
+                        log.info(f"    Skip row {row_num} [{mpn}]: cell already has {repr(existing)}")
                         total_skipped += 1
                         continue
 
@@ -306,6 +327,7 @@ def fill_boms(
                         total_missing += 1
                         log.info(f"    No match in Octopart: [{mfr}]  [{mpn}]")
 
+        wb_ro.close()
         try:
             wb.save(f)
             log.info(f"  Saved  {f.name}")