diff --git a/etemplate/js/et2_widget_entry.js b/etemplate/js/et2_widget_entry.js
index 26cfbdbecf..8bc24fdf88 100644
--- a/etemplate/js/et2_widget_entry.js
+++ b/etemplate/js/et2_widget_entry.js
@@ -45,7 +45,7 @@ var et2_entry = et2_valueWidget.extend(
 		},
 		alternate_fields: {
 			name: 'Alternate fields',
-			description: 'colon (:) separated list of alternative fields.  The first non-empty one is used if the selected field is empty',
+			description: 'colon (:) separated list of alternative fields.  The first non-empty one is used if the selected field is empty, (-) used for subtraction',
 			type: 'string',
 			default: et2_no_init
 		},
@@ -134,7 +134,8 @@ var et2_entry = et2_valueWidget.extend(
 			var fields = this.options.alternate_fields.split(':');
 			for(var i = 0; i < fields.length; i++)
 			{
-				var value = this.getArrayMgr('content').getEntry(fields[i]);
+				var value =  (fields[i][0] == "-")? this.getArrayMgr('content').getEntry(fields[i].replace('-',''))*-1:
+								this.getArrayMgr('content').getEntry(fields[i]);
 				sum += parseFloat(value);
 				if(value && this.options.field !== 'sum')
 				{
diff --git a/infolog/inc/class.infolog_widget.inc.php b/infolog/inc/class.infolog_widget.inc.php
index 4fcb0b147a..990774a395 100644
--- a/infolog/inc/class.infolog_widget.inc.php
+++ b/infolog/inc/class.infolog_widget.inc.php
@@ -10,6 +10,17 @@
  * @version $Id$
  */
 
+/**
+ * Infolog widget et2 representation:
+ * Both infolog-value and infolog-fields widgets are using client-side et2_widget_entry
+ * and the format to address them in template is as follows:
+ *
+ * <infolog-value id="fieldname" or value="@fieldname"
+ *   options="[field(e.g. sum), compare, alternate_fields(e.g. (-)#customfileds, use '-' if we need subtraction)]"
+ * />
+ *
+ */	
+	
 /**
  * eTemplate extension: InfoLog widget
  *