---

select
    si.id,
    sum(
        coalesce(rd.sum_dt_pu, 0)
        - coalesce(rd.sum_ct_pu, 0)
    ) as s_pu,
    sum(
        coalesce(rd.sum_dt_bu, 0)
        - coalesce(rd.sum_ct_bu, 0)
    ) as s_bu