diff --git a/litellm_dashboard.py b/litellm_dashboard.py
index 85b7569..b3e094a 100644
--- a/litellm_dashboard.py
+++ b/litellm_dashboard.py
@@ -101,10 +101,10 @@ class Tools:
         if not pricing: return ""
         uncached = max(0, prompt - cached)
         actual_output = max(0, completion - reasoning)
-        calc = (cached * pricing.get("input_cached", 0)) + \
-               (uncached * pricing.get("input", 0)) + \
-               (actual_output * pricing.get("output", 0)) + \
-               (reasoning * pricing.get("reasoning", pricing.get("output", 0)))
+        calc = (cached * (pricing.get("input_cached") or 0)) + \
+               (uncached * (pricing.get("input") or 0)) + \
+               (actual_output * (pricing.get("output") or 0)) + \
+               (reasoning * (pricing.get("reasoning") or pricing.get("output") or 0))
         delta = reported_cost - calc
         symbol = "⚠️" if abs(delta) > 0.005 else "✓"
         return f" [calc: ${calc:.4f} {symbol}]"