Irequire your help in the following query as to how to optimize it

update spool_info set
weight = (select weight as total_weight from
(
SELECT fabshopno,sum(ALLOC_QTY* b.WEIGHT_KG) as weight
FROM SPOOL_MTO a, WEIGHT_SURF_AREA b
where a.fabshopno in
(select fabshopno from spool_mto where material_code ‘PSH20A0D’) and a.MATERIAL_CODE = b.MATCODE and a.SIZE1=b.SIZE1 and a.SIZE2=b.SIZE2 group by a.fabshopno
) where fabshopno = spool_info.fabshopno
)
where spool_info.fabshopno in
(select fabshopno from spool_mto where material_code = ‘PSH20A0D’)

Here if you see the following query is repeated twice:

(select fabshopno from spool_mto where material_code = ‘PSH20A0D’)

My question is to how to remove the above query in the nested inner query of weight.