Custom Chart- Quota Burnup

I am fairly new to Dynamics CRM and am attempting to create a quota burnup chart that shows the total amount of quota (sum of all violation costs) completed over a given stretch of time. Using the following code, I am able to show amount of quota completed on each specific date, but am having trouble doing an overall day-over-day sum:

 <datadescription>

   <datadefinition>

     <fetchcollection>

       <fetch mapping="logical" aggregate="true">

         <entity name="new_citation">

           <attribute name="new_timestamp" groupby="true" alias="_CRMAutoGen_groupby_column_Num_0" dategrouping="month" />

           <link-entity name="new_new_citation_new_violation" from="new_citationid" to="new_citationid" visible="false" intersect="true">

             <link-entity name="new_violation" from="new_violationid" to="new_violationid" alias="ad">

               <attribute name="new_cost" aggregate="sum" alias="violationCost"/>

             </link-entity>

           </link-entity>

         </entity>

       </fetch>

     </fetchcollection>

     <categorycollection>

       <category>

         <measurecollection>

           <measure alias="violationCost" />

         </measurecollection>

       </category>

     </categorycollection>

   </datadefinition>

 </datadescription>

Any help or referenes greatly appreciated.