CREATE TABLE table_67555 ("Builder" TEXT, "Construct- tion no." FLOAT, "Date ordered" TEXT, "Wheel arrange- ment" TEXT, "s Cylinder" TEXT, "Engine weight" TEXT, "TC&StL no.  ( 1883\\u201384 ) " FLOAT)

How many constructions has a Wheel arrange- ment of 4-4-0?
SELECT SUM("Construct- tion no.") FROM table_67555 WHERE "Wheel arrange- ment" = '4-4-0'
SELECT SUM("Construct- tion no.") FROM "table_67555" WHERE "Wheel arrange- ment" = '4-4-0'