Had to create a custom content block table to show Incidents resolved this month.
Format had to be Assignment Group, Number of Incidents Resolved, Average Duration, and Average Duration in Hours.

<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">
<style>
<style>
table{
}
th{
border: 1px solid #000000;
color: #50c878;
font-family: "Times New Roman";
text-align: left;
padding: 2px;
font-size:28px
}
td {
border: 1px solid #000000;
color: #000000;
font-size:23px;
text-align: left;
padding: 2px;
}
tr:nth-child(even) {
background-color: #E8E8E8;
}
</style>
</style>
<g:evaluate>
var agg = new GlideAggregate('incident');
agg.addEncodedQuery("stateIN6,7,8^resolved_atONThis month@javascript:gs.beginningOfThisMonth()@javascript:gs.endOfThisMonth()")
agg.addAggregate('AVG', 'calendar_duration');
agg.addAggregate('COUNT');
agg.groupBy('assignment_group');
agg.orderByAggregate('AVG','calendar_duration');
agg.query();
</g:evaluate>
<table width="100%">
<tr>
<th>
<b><center>Assignment Group</center> </b>
</th>
<th>
<b > <center> Resolved </center> </b>
</th>
<th>
<b> <center> Time to Resolve </center> </b>
</th>
<th>
<b> <center> Duration in Hours </center> </b>
</th>
</tr>
<j:while test="${agg.next()}">
<g:evaluate>
var agr = "${agg.getAggregate('AVG', 'calendar_duration')}";
var dur = new GlideDuration();
dur.setDisplayValue(agr);
var days = parseInt(dur.getDayPart(), 10);
var hours = parseInt(dur.getByFormat('HH'), 10);
var minutes = parseInt(dur.getByFormat('mm'), 10);
var days0 = parseInt(dur.getDayPart(), 10).toFixed(0);
var hours0 = parseInt(dur.getByFormat('HH'), 10).toFixed(0);
var minutes0 = parseInt(dur.getByFormat('mm'), 10).toFixed(0);
var totalHours = parseFloat( (days * 24) + hours + (minutes / 60) ).toFixed(2);
</g:evaluate>
<tr>
<td style="color:#50c878;font-family: 'Times New Roman';">
<b> <center> ${agg.assignment_group.getDisplayValue()}</center></b>
</td>
<td>
<b> <center> ${agg.getAggregate('COUNT')} </center></b>
</td>
<td>
<b><center> ${days0} Days ${hours0} Hours ${minutes0} Minutes</center></b>
</td>
<td>
<b><center> ${totalHours} Hours </center></b>
</td>
</tr>
</j:while>
</table>
</j:jelly>
