я сделал несколько иначе чем ув. Victor, а именно - я отошел от хардкодед наименований трафиков в пользу парсинга XML
<!-- сессии логина -->
<xsl:template name="ShowSessions">
<form method="post" action="webexecuter#idDivReport" name="sessions">
<xsl:variable name="module" select="/data/@module" />
<xsl:call-template name="action" />
<xsl:call-template name="error" />
<xsl:call-template name="sessionFilter" />
</form>
<form method="post" action="webexecuter">
<xsl:call-template name="action" />
<input type="hidden" name="createDetail" value="1" />
<div style="display:none">
<xsl:call-template name="sessionFilter" />
</div>
<xsl:call-template name="report">
<xsl:with-param name="node" select="sessions" />
<xsl:with-param name="data">
<table cellspacing="1" id="idTableDialUpSessions">
<col class="col1" />
<col class="col2" />
<col class="col3" />
<col class="col4" />
<col class="col5" />
<xsl:call-template name="split_col">
<xsl:with-param name="list"><xsl:value-of select="sessions/@traffics_title" /></xsl:with-param>
<xsl:with-param name="delimiter">/</xsl:with-param>
</xsl:call-template>
<col class="col7" />
<thead>
<tr>
<td>Логин</td>
<td>Время входа</td>
<td>Время выхода</td>
<td>Длительность<br /> сеанса, мин. [сек.]</td>
<td>Сумма, руб.</td>
<xsl:call-template name="split_td">
<xsl:with-param name="list"><xsl:value-of select="sessions/@traffics_title" /></xsl:with-param>
<xsl:with-param name="delimiter">/</xsl:with-param>
<xsl:with-param name="text">, MB</xsl:with-param>
</xsl:call-template>
<td style="background-color: #ffffff; border-top-color: #ffffff; border-right-color: #ffffff;">
</td>
</tr>
</thead>
<tbody>
<xsl:for-each select="sessions/row">
<tr>
<td><xsl:value-of select="@login" /></td>
<td><xsl:value-of select="@f0" /></td>
<td><xsl:value-of select="@f1" /></td>
<td><xsl:value-of select="@f2" /></td>
<td align="right">
<xsl:value-of select="format-number(translate(@f3, ' ', ''), '#0.00')" /> <!-- 1 602.78748 -->
</td>
<xsl:for-each select="traffic">
<td align="right">
<xsl:value-of select="format-number((. div 1048576), '#0.000')" />
</td>
</xsl:for-each>
<td><input type="radio" name="session_id" value="{@id}" style="margin:0px; padding:0px;" /></td>
</tr>
</xsl:for-each>
</tbody>
<tfoot>
<tr>
<td colspan="3">Итого сессий: <xsl:value-of select="sessions/@count_amount" /></td>
<td><xsl:value-of select="sessions/@time_amount" /></td>
<td align="right">
<xsl:value-of select="format-number(sessions/@money_amount, '#0.00')" />
</td>
<xsl:for-each select="sessions/traffic">
<td align="right">
<xsl:value-of select="format-number((. div 1048576), '#0.000')" />
</td>
</xsl:for-each>
<td style="border-right-color: #ffffff; border-bottom-color: #ffffff;">
</td>
</tr>
</tfoot>
</table>
</xsl:with-param>
</xsl:call-template>
<br />
<xsl:choose>
<xsl:when test="not(sessions/row)"></xsl:when>
<xsl:when test="createDetail/@created='1'">
<table cellspacing="0" class="filter">
<tr>
<th>Отправка детализации поставлена в очередь.</th>
</tr>
</table>
</xsl:when>
<xsl:otherwise>
<table cellspacing="0" class="filter" id="idTableDialupCreateDetail">
<tr>
<th>Выслать детализацию для выбранной сессии на e-mail: <input type="text" name="mail" size="30" class="filter"></input></th>
<th>
<xsl:call-template name="submit">
<xsl:with-param name="title">Выслать</xsl:with-param>
</xsl:call-template>
</th>
</tr>
</table>
</xsl:otherwise>
</xsl:choose>
</form>
</xsl:template>
<!-- наработка по логинам -->
<xsl:template name="ShowLoginsBalance">
<form method="post" action="webexecuter#idDivReport" name="sessions">
<xsl:variable name="module" select="/data/@module" />
<xsl:call-template name="action" />
<input type="hidden" name="page" value="1" />
<xsl:call-template name="periodFilter" />
<div class="report" id="idDivReportTable">
<table cellspacing="1" id="idTableDialUpLoginsBalance">
<thead>
<tr>
<td>Логин</td>
<td>Кол-во сессий</td>
<td>Время [сек.]</td>
<td>Стоимость</td>
<xsl:if test="$module='dialup'">
<xsl:call-template name="split_td">
<xsl:with-param name="list"><xsl:value-of select="amounts/@traffics_title" /></xsl:with-param>
<xsl:with-param name="delimiter">/</xsl:with-param>
<xsl:with-param name="text">, MB</xsl:with-param>
</xsl:call-template>
</xsl:if>
</tr>
</thead>
<tbody>
<xsl:for-each select="amounts/row">
<tr>
<td>
<xsl:value-of select="@f0" />
</td>
<td><xsl:value-of select="@f1" /></td>
<td><xsl:value-of select="@f2" /></td>
<td align="right">
<xsl:value-of select="format-number(@f3, '#0.00')" />
</td>
<xsl:if test="$module='dialup'">
<xsl:for-each select="traffic">
<td align="right">
<xsl:value-of select="format-number((. div 1048576), '#0.000')" />
</td>
</xsl:for-each>
</xsl:if>
</tr>
</xsl:for-each>
</tbody>
<tfoot>
<tr>
<td align="right">Итого:</td>
<td><xsl:value-of select="amounts/@count_amount" /></td>
<td><xsl:value-of select="amounts/@time_amount" /></td>
<td align="right"><xsl:value-of select="amounts/@money_amount" /></td>
<xsl:if test="$module='dialup'">
<xsl:for-each select="amounts/traffic">
<td align="right">
<xsl:value-of select="format-number((. div 1048576), '#0.000')" />
</td>
</xsl:for-each>
</xsl:if>
</tr>
</tfoot>
</table>
</div>
</form>
</xsl:template>
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ну вы меня понимаете.
сначала ложка мёда затем ведро дегтя, написал так написал 
до соответствующего функционала?