in total what was the total amount of tpn d13.0 that patient 30044 had received until 1579 days ago?
select sum(inputevents_cv.amount) from inputevents_cv where inputevents_cv.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 30044 ) ) and inputevents_cv.itemid in ( select d_items.itemid from d_items where d_items.label = 'tpn d13.0' and d_items.linksto = 'inputevents_cv' ) and datetime(inputevents_cv.charttime) <= datetime(current_time,'-1579 day')