select Contentid, Sum(Width)/72 WidthInches from (
select contentid
,xWidth.value('.','int') Width
,xRows.value('.','int') Rows
,xColumns.value('.','int') Columns
from grids gg
cross apply data.nodes('//Width') tWidth(xWidth)
cross apply data.nodes('//ColumnInfo/Count') tColumns(xColumns)
cross apply data.nodes('//RowInfo/Count') tRows(xRows)
--where contentid = 44566
) AH
where Rows=1 and Columns = 1 and Width > 500
group by ContentID order by sum(width) desc