style added

src/css/style.scss

@@ -91,6 +91,10 @@ $btn-bg: #8e54e9;
 $btn-border: #8e54e9;
 $event-padding: 10px;
 
+.billing{
+  background-color: darkgoldenrod;
+  color: white;
+}
 .extraProductCard{
   background-color: aliceblue;
   border-radius: 5px;