diff --git a/FrontendWebApi/ApiControllers/TenantBillController.cs b/FrontendWebApi/ApiControllers/TenantBillController.cs
index 50dda76..2c8f285 100644
--- a/FrontendWebApi/ApiControllers/TenantBillController.cs
+++ b/FrontendWebApi/ApiControllers/TenantBillController.cs
@@ -670,7 +670,7 @@ namespace FrontendWebApi.ApiControllers
                         $"                    <td><strong>水費總計: </strong>{item.water_bill}元</td> " +
                         $"                </tr> " +
                         $"            </table> " +
-                        $"            <p style=\"font-size: larger; color: red; text-align: right; margin: 0; padding: 0;\"><strong>總計(費用)：各電/水量加總 * 單價</p> " +
+                        $"            <p style=\"font-size: larger; color: red; text-align: right; margin: 0; padding: 0;\"><strong>總計(費用)：各電/水量加總 * 單價(四捨五入)</p> " +
                         $"        </div> " +
                         $"        <div class=\"total\"> " +
                         $"            <div class=\"total-area\"> " +