Using CSS to control formatting in dbmail

I have written a query and currently have a job that runs and sends an email using sp_send_dbmail in a formatted table if certain conditions are met. I use style sheets to control the format and this works fine for all columns returned using the style for td but I have a need to control the format of individual columns of data only, i.e. control the text alignment, data type, color, etc. of the value column data independently of the column header. I would like to format the individual columns below to a currency if possible and right justify them. Even if I can not format to currency, if i could format to a number format with a comma separated value (XX,XXX) I can concatenate the $ sign. I have attached a snippet of the table output as well as the code.
 
FYI- there is another table below the summary table shown here but I did not send it. Much similar in nature, I just need guidance on getting the style sheet embedded to work.

I found during my search on the web a query written almost identical to mine with the same issue and the response was as follows:
Note: create a css classes for each td above.
> CAST
> (( SELECT
> [td/@class]='anyclassname1', td = [Column Name 1], "*"='',
> [td/@class]='anyclassname2', td = [Column Name 2], "*"='', etc.

I have tried this and substituted [td/@class]='text-align: right', and can not get it to work.
Any help would be greatly appreciated.

> DECLARE @bodyMsg nvarchar(max)
> DECLARE @subject nvarchar(max)
> DECLARE @tableSummary nvarchar(max)
> 
> SET @subject = 'Matter Alert for 189274'
> 
> 
> 
> SET @tableSummary =
> N'<style type="text/css">
> #box-table
> {
> font-family: "Lucida Sans Unicode", "Lucida Grande", Sans-Serif;
> font-size: 12px;
> text-align: left;
> border-collapse: collapse;
> border-top: 7px solid #9baff1;
> border-bottom: 7px solid #9baff1;
> }
> #box-table th
> {
> padding: 5px;
> font-size: 13px;
> font-weight: normal;
> background: #b9c9fe;
> border-right: 2px solid #9baff1;
> border-left: 2px solid #9baff1;
> border-bottom: 2px solid #9baff1;
> color: #039;
> }
> #box-table td
> {
> padding: 5px;
> border-right: 1px solid #aabcfe;
> border-left: 1px solid #aabcfe;
> border-bottom: 1px solid #aabcfe;
> color: #669;
> }
> tr:nth-child(odd) { background-color:#eee; }
> tr:nth-child(even) { background-color:#fff; }
> </style>'+
> N'<H3><font color="Red">Matter Management Alert</H3>' +
> N'<table id="box-table" >' +
> N'<tr><font color="Green">
> <th>Base Rate Value (B)</th>
> <th>Value at A Rate</th>
> <th>Value at C Rate</th>
> <th>Value at $125/Hr</th>
> <th>Threshold</th>
> </tr>' +
> CAST ( (
> 
> SELECT
> td = cast(sum(itdr.[Base Amt]) as numeric(25,2)),'',
> td = cast(sum(itdr.[A Rate Value]) as numeric(25,2)),'',
> td = cast(sum(itdr.[C Rate Value]) as numeric(25,2)),'',
> td = cast( sum(
> CASE WHEN itdr.[Employee Code] = 'TLW'
> THEN (itdr.[Base Hrs] * 125)
> ELSE (itdr.[Base Amt])
> END
> ) as numeric(25,2)),'',
> td = '5000'
> FROM Intl_Tax_Data_Run itdr
> where itdr.[Matter Code] = '189274'
> FOR XML PATH('tr'), TYPE
> ) AS NVARCHAR(MAX) ) +
> 
> N'</table>'
> 
> declare @nbody varchar(max)
> 
> 
> set @nbody = @tableSummary
> 
> 
> 
> 
> EXEC msdb.dbo.sp_send_dbmail
> @profile_name = 'ProfileName',
> @recipients='s_smith@sample.com',
> @from_address = 's_smith@sample.com',
> @subject = @subject,
> @body = @nbody,
> @body_format = 'HTML' ;
Table.JPG