what is the minimum total cost of the hospital which include hemogloblin s in this year?
select min(t1.c1) from ( select sum(cost.cost) as c1 from cost where cost.hadm_id in ( select labevents.hadm_id from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'hemogloblin s' ) ) and datetime(cost.chargetime,'start of year') = datetime(current_time,'start of year','-0 year') group by cost.hadm_id ) as t1