diff --git a/Gemfile.lock b/Gemfile.lock
index f92ebde..434fd4c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -66,7 +66,7 @@ GEM
       net-http
     faraday-retry (2.2.1)
       faraday (~> 2.0)
-    fbe (0.0.71)
+    fbe (0.0.72)
       backtrace (> 0)
       decoor (> 0)
       factbase (> 0)
diff --git a/test/pages/test_awards.rb b/test/pages/test_awards.rb
index 38fe52f..798c25c 100644
--- a/test/pages/test_awards.rb
+++ b/test/pages/test_awards.rb
@@ -71,6 +71,54 @@ def test_payables
     assert_equal('55', xml.xpath('/td/text()').to_s, xml)
   end
 
+  def test_payables_with_few_reconciliations
+    xml = xslt(
+      "<xsl:copy-of select=\"z:payables('dude')\"/>",
+      "
+      <fb>
+        <f>
+          <what>reconciliation</what>
+          <when>#{(Time.now - (100 * 60 * 60)).utc.iso8601}</when>
+          <since>#{(Time.now - (200 * 60 * 60)).utc.iso8601}</since>
+          <who_name>dude</who_name>
+          <awarded>400</awarded>
+          <payout>230</payout>
+          <balance>-120</balance>
+        </f>
+        <f>
+          <what>reconciliation</what>
+          <when>#{(Time.now - (60 * 60)).utc.iso8601}</when>
+          <since>#{(Time.now - (50 * 60 * 60)).utc.iso8601}</since>
+          <who_name>dude</who_name>
+          <awarded>100</awarded>
+          <payout>70</payout>
+          <balance>30</balance>
+        </f>
+        <f>
+          <is_human>1</is_human>
+          <when>#{(Time.now - (10 * 60 * 60)).utc.iso8601}</when>
+          <who_name>dude</who_name>
+          <award>40</award>
+        </f>
+        <f>
+          <is_human>1</is_human>
+          <when>#{(Time.now - (10 * 60 * 60)).utc.iso8601}</when>
+          <who_name>dude</who_name>
+          <award>60</award>
+        </f>
+        <f>
+          <is_human>1</is_human>
+          <when>#{Time.now.utc.iso8601}</when>
+          <who_name>dude</who_name>
+          <award>25</award>
+        </f>
+      </fb>
+      ",
+      'today' => (Time.now - (10 * 60 * 60)).utc.iso8601
+    )
+    assert_equal('55', xml.xpath('/td/text()').to_s, xml)
+  end
+
   def test_monday
     xml = xslt(
       '<r><xsl:value-of select="z:monday(1)"/></r>',
diff --git a/xsl/awards.xsl b/xsl/awards.xsl
index 90ef6f9..d40fd02 100644
--- a/xsl/awards.xsl
+++ b/xsl/awards.xsl
@@ -30,8 +30,12 @@ SOFTWARE.
   <xsl:variable name="facts" select="$fb/f[award and xs:dateTime(when) &gt; $since and is_human = 1]"/>
   <xsl:function name="z:monday" as="xs:date">
     <!--
-      Takes week number (e.g. 4) and returns ISO-8601 date of the
-      Monday of this week. Weeks counting starts from $today.
+    Takes week number (e.g. 4) and returns ISO-8601 date of the
+    Monday of this week. Weeks counting starts from the n-th week
+    before $today (total number of weeks is specified in
+    the "days_of_running_balance" property of the "pmp/hr" fact. Thus,
+    if the week number is 2 and there are 56 days of running balance, it is
+    the 7th week back in the past from today.
     -->
     <xsl:param name="week" as="xs:integer"/>
     <xsl:variable name="d" select="xs:dateTime($today) - xs:dayTimeDuration(concat('P', ($weeks - $week) * 7, 'D'))"/>
@@ -39,6 +43,10 @@ SOFTWARE.
     <xsl:value-of select="xs:date($d) - xs:dayTimeDuration(concat('P', $dow - 1, 'D'))"/>
   </xsl:function>
   <xsl:function name="z:in-week" as="xs:boolean">
+    <!--
+    Takes date and week number (e.g. 4) and returns 'true' if the date is
+    inside the week. Weeks counting starts from the n-th week before today.
+    -->
     <xsl:param name="when" as="xs:string"/>
     <xsl:param name="week" as="xs:integer"/>
     <xsl:variable name="monday" select="xs:dateTime(z:monday($week))"/>
@@ -46,6 +54,10 @@ SOFTWARE.
     <xsl:value-of select="xs:dateTime($when) &gt; $monday and xs:dateTime($when) &lt; $sunday"/>
   </xsl:function>
   <xsl:function name="z:payables">
+    <!--
+    Calculates the amount to be paid to a user, according to the information
+    in current awards and previously posted "reconciliation" facts.
+    -->
     <xsl:param name="name"/>
     <xsl:variable name="rec" select="$fb/f[what='reconciliation' and who_name=$name][last()]"/>
     <xsl:choose>