+ my $q_assembly_lastcost =
+ qq|(SELECT SUM(a_lc.qty * p_lc.lastcost / COALESCE(pfac_lc.factor, 1))
+ FROM assembly a_lc
+ LEFT JOIN parts p_lc ON (a_lc.parts_id = p_lc.id)
+ LEFT JOIN price_factors pfac_lc ON (p_lc.price_factor_id = pfac_lc.id)
+ WHERE (a_lc.id = p.id)) AS lastcost|;