more clarity whether a number is number units or boxes

app/assets/stylesheets/bootstrap_and_overrides.css.less

@@ -252,3 +252,15 @@ tr.unavailable {
 .input-append button.add-on {
   height: inherit;
 }
+
+// show package icon after amount of package numbers
+.package {
+  background: url(package-bg.png) no-repeat right center;
+}
+i.package {
+  width: 18px;
+  color: transparent; // hide text inside
+}
+.input-nano {
+  width: 30px;
+}

app/views/finance/receive/_edit_article.html.haml

@@ -8,9 +8,14 @@
     %td.name{title: order_title.join("\n")}= order_article.article.name
     %td #{order_article.article.unit_quantity} × #{order_article.article.unit}
     %td #{order_article.quantity} + #{order_article.tolerance}
-    %td= order_article.units_to_order
-    %td= order_article.units_billed
     %td
-      = form.text_field :units_received, class: 'input-mini', data: {'units-expected' => units_expected}
+      = order_article.units_to_order
+      %i.package pkg
+    %td
+      - unless order_article.units_billed.nil?
+        = order_article.units_billed
+        %i.package pkg
+    %td
+      = form.text_field :units_received, class: 'input-nano package', data: {'units-expected' => units_expected}
       / TODO add almost invisible text_field for entering single units
     %td.units_delta