fix(est): match project costs and stored formulas

tools/est-test/native-math.js

@@ -26,7 +26,12 @@ const EstMath = (() => {
   }
   function floating(value, digits = 0, method = 2) {
     const k = 10 ** digits;
-    return mode((value + Math.sign(value) * 2e-10) * k, method) / k;
+    // The original keeps x87 extended intermediates. Account for one binary64
+    // rounding unit before truncation so exact decimal boundaries survive JS.
+    const scaled = value * k;
+    return (
+      mode(scaled + Math.sign(value) * (2e-10 * k + Number.EPSILON * Math.abs(scaled)), method) / k
+    );
   }
   function precision(row, fallback = 0) {
     return num(row.DigetIndex)
@@ -63,7 +68,9 @@ const EstMath = (() => {
     const result = Object.fromEntries(
       components.map((key) => [
         key,
-        floating(rows.filter(predicate).reduce((n, row) => n + num(row[key]), 0)),
+        floating(
+          rows.filter(predicate).reduce((n, row) => n + even(num(row[key]) * 10000), 0) / 10000,
+        ),
       ]),
     );
     result.TC = sum(result);