CREATE TABLE table_55745 ("Name" TEXT, "Country" TEXT, "Type" TEXT, "Moving from" TEXT, "Transfer window" TEXT, "Transfer fee" TEXT)

Name the transfer fee with a transfer window of summer for schollen
SELECT "Transfer fee" FROM table_55745 WHERE "Transfer window" = 'summer' AND "Name" = 'schollen'
SELECT "Transfer fee" FROM "table_55745" WHERE "Name" = 'schollen' AND "Transfer window" = 'summer'