if ( @usage_subtotals ) {
unshift @sections, $usage_subtotals[0]->{section}; # do not summarize
unshift @detail_items, @usage_subtotals;
if ( @usage_subtotals ) {
unshift @sections, $usage_subtotals[0]->{section}; # do not summarize
unshift @detail_items, @usage_subtotals;