if { ![info exists item_source_invoice_id] || "" == $item_source_invoice_id }{
ad_return_complaint 1 "Preview not supported.<br>Maybe you have created a quote for project <a href='/intranet/projects/view?project_id=$project_id'>$project_id</a> with an earlier version of PO"
}
set sum_sql "
select
sum(a.line_total) as sum_quote
from
(select
trunc((ii.price_per_unit * ii.item_units) :: numeric, 2) as line_total
from
im_invoice_items ii
where
project_id = $project_id and
item_source_invoice_id = $item_source_invoice_id
) a
"
set sum_quote [db_string get_sum_quote $sum_sql -default 0]
set quote_name [db_string get_quote_name "select cost_name from im_costs where cost_id = $item_source_invoice_id" -default 0]