diff --git a/templates/admin/ai_usage_dashboard.html b/templates/admin/ai_usage_dashboard.html
index 0d4ce8d..15db13a 100644
--- a/templates/admin/ai_usage_dashboard.html
+++ b/templates/admin/ai_usage_dashboard.html
@@ -366,7 +366,7 @@
                 <td>{{ day.chat_requests }}</td>
                 <td>{{ day.news_evaluation_requests }}</td>
                 <td>
-                    {% set day_cost_pln = ((day.total_cost_cents or 0) / 100) * stats.usd_to_pln %}
+                    {% set day_cost_pln = (((day.total_cost_cents or 0)|float) / 100) * stats.usd_to_pln %}
                     <span class="cost-badge {% if day_cost_pln > 1.0 %}high{% elif day_cost_pln > 0.2 %}medium{% endif %}">
                         {{ "%.2f"|format(day_cost_pln) }} zl
                     </span>