How much is the part supply cost for the medium metallic grey dodger linen?
part supply cost refers to ps_supplycost; medium metallic grey dodger linen refers to p_name = 'medium metallic grey dodger linen'
SELECT T2.ps_supplycost FROM part AS T1 INNER JOIN partsupp AS T2 ON T1.p_partkey = T2.ps_partkey WHERE T1.p_name = 'medium metallic grey dodger linen'