diff --git a/builder/build_pricing_path_base.pg.sql b/builder/build_pricing_path_base.pg.sql
new file mode 100644
index 0000000..1e8808f
--- /dev/null
+++ b/builder/build_pricing_path_base.pg.sql
@@ -0,0 +1,167 @@
+DROP FUNCTION pricequote.build_pricing_path_base;
+
+CREATE OR REPLACE FUNCTION pricequote.build_pricing_path_base(
+  _json JSONB
+)
+RETURNS TABLE (
+     stlc       TEXT
+    ,seq        BIGINT
+    ,srtcode    TEXT
+    ,ds         TEXT
+    ,chan       TEXT
+    ,tier       TEXT
+    ,vol        INT4RANGE
+    ,func       TEXT
+    ,val        NUMERIC
+    ,price      NUMERIC
+    ,math       TEXT[]
+    ,lastflag   BOOLEAN
+)
+LANGUAGE plpgsql AS
+$$
+BEGIN
+RETURN QUERY
+
+WITH RECURSIVE
+-- 1️⃣ Parse JSONB into rows of (entity, attr, val)
+parsed AS (
+  SELECT
+    e.entity,
+    COALESCE(e.attr, '') AS attr,
+    e.val,
+    e.func
+  FROM jsonb_to_recordset(_json)
+       AS e(entity TEXT, attr TEXT, val NUMERIC, func TEXT)
+),
+-- 2️⃣ Attach sequence & func from master option_sequence table
+sequenced AS (
+  SELECT
+    p.entity,
+    p.attr,
+    p.val,
+    p.func,
+    s.DOMAIN,
+    DENSE_RANK() OVER (ORDER BY s.seq) AS seq,
+    ROW_NUMBER() OVER (PARTITION BY p.entity ORDER BY COALESCE(p.val,0) ASC) srt
+  FROM parsed p
+  JOIN pricequote.option_sequence s
+    ON p.entity = s.entity
+)
+--select * from sequenced ORDER BY seq, srt
+-- 3️⃣ Recursively accumulate pricing path
+,combos AS (
+  -- 🚀 Base case: first in sequence
+  SELECT
+    s.entity,
+    s.attr,
+    s.seq,
+    to_char(s.srt,'FM000') srtcode,
+    '' ds,
+    '' chan,
+    '' tier,
+    null::TEXT vol,
+    s.func,
+    s.val,
+    s.val agg,
+    CASE WHEN s.func = 'Price' THEN s.val ELSE NULL::NUMERIC END AS base,
+   ARRAY[
+     CASE
+       WHEN s.func = 'Price' THEN
+         RPAD(s.entity || ':' || s.attr, 17, ' ') || ' + ' || LPAD(to_char(s.val, 'FM9999999990.00000'), 10, ' ')
+       WHEN s.func = 'Factor' THEN
+         RPAD(s.entity || ':' || s.attr, 17, ' ') || ' + ' || LPAD(to_char(COALESCE(NULLIF(CASE WHEN s.func = 'Price' THEN s.val END, NULL), 0) * (s.val - 1), 'FM9999999990.00000'), 10, ' ')
+       ELSE
+         RPAD(s.entity || ':' || s.attr, 17, ' ') || '   ' || LPAD(to_char(s.val, 'FM9999999990.00000'), 10, ' ')
+     END
+   ] math
+  FROM 	
+  	sequenced s
+  WHERE 
+  	s.seq = (SELECT MIN(x.seq) FROM sequenced x)
+  UNION ALL
+  -- 🔁 Recursive step: process next in sequence
+  SELECT
+    c.entity,
+    c.attr,
+    o.seq,
+    c.srtcode || '.' || to_char(o.srt,'FM000'),
+    c.ds || CASE WHEN o.DOMAIN = 'Product' THEN '.' || o.attr ELSE '' END,
+    CASE WHEN o.DOMAIN = 'Channel' THEN o.attr ELSE c.chan END chan,
+    CASE WHEN o.DOMAIN = 'Tier' THEN o.attr ELSE c.tier END tier,
+    CASE WHEN o.DOMAIN = 'Volume' THEN o.attr ELSE c.vol END vol,
+    o.func,
+    o.val,
+    CASE 
+      WHEN o.func = 'Price'  THEN c.agg + o.val
+      WHEN o.func = 'Factor' THEN c.agg + COALESCE(c.base, 0) * (o.val - 1)
+    END agg,
+    COALESCE(c.base, CASE WHEN o.func = 'Price' THEN o.val ELSE NULL::NUMERIC END) AS base,
+    CASE WHEN (o.func = 'Price' AND o.val <> 0) OR (o.func = 'Factor' AND o.val <> 1) THEN
+        c.math ||
+        ARRAY[
+         CASE
+           WHEN o.func = 'Price' THEN
+             RPAD(o.entity || ':' || o.attr, 17, ' ') || ' + ' || LPAD(to_char(o.val, 'FM9999999990.00000'), 10, ' ')
+           WHEN o.func = 'Factor' THEN
+             RPAD(o.entity || ':' || o.attr, 17, ' ') || ' + ' || LPAD(to_char(COALESCE(c.base, 0) * (o.val - 1), 'FM9999999990.00000'), 10, ' ')
+           ELSE
+             RPAD(o.entity || ':' || o.attr, 17, ' ') || '   ' || LPAD(to_char(o.val, 'FM9999999990.00000'), 10, ' ')
+         END
+       ]
+    ELSE 
+        c.math 
+    END math
+  FROM 
+  	combos c
+  	JOIN sequenced o ON 
+  		o.seq = c.seq + 1
+)
+SELECT 
+     -- c.entity
+     c.attr
+    ,c.seq
+    ,c.srtcode
+    ,'v1:'||SUBSTRING(c.ds,2,100) ds
+    ,c.chan
+    ,c.tier
+    -- ,c.vol
+    ,CASE
+        WHEN c.vol ~ '^[0-9]+-[0-9]+$' THEN
+          int4range(
+            split_part(c.vol, '-', 1)::int,
+            split_part(c.vol, '-', 2)::int,
+            '[)'
+          )
+        WHEN c.vol ~ '^[0-9]+$' THEN
+          int4range(
+            c.vol::int,
+            NULL,
+            '[)'
+          )
+        ELSE NULL
+    END AS vol
+    ,c.func
+    ,c.val
+    ,c.agg
+    ,c.math
+    ,c.seq = (SELECT max(x.seq) FROM sequenced x) lastflag
+FROM 
+    combos c /*WHERE seq = (SELECT max(seq) FROM sequenced)*/ 
+ORDER BY 
+    c.srtcode ASC;
+
+END;
+$$;
+
+/*
+Anchor:EU170S50 + 0.08
+Color Tier:P    x 1.30
+Branding:       + 0.00
+Packaging:SLV   + 0.00
+Suffix:PCR      x 1.00
+Accessories:    + 0.00
+Channel:WHS     + 0.00
+Volume:8        x 1.00
+-----------------------
+                  0.104
+*/