Translate the following question to SQL: Find the total revenue of companies whose revenue is larger than the revenue of some companies based in Austin.

Schema: CREATE TABLE Manufacturers (
    Code INTEGER   PRIMARY KEY,
    Name VARCHAR(255) NOT NULL,
    Headquarter VARCHAR(255) NOT NULL,
    Founder VARCHAR(255) NOT NULL,
    Revenue REAL
);

CREATE TABLE Products (
    Code INTEGER   PRIMARY KEY,
    Name VARCHAR(255) NOT NULL,
    Price DECIMAL NOT NULL,
    Manufacturer INTEGER NOT NULL,
    FOREIGN KEY (Manufacturer) REFERENCES Manufacturers(Code)
);
user
SELECT sum(revenue) FROM manufacturers WHERE revenue  >  (SELECT min(revenue) FROM manufacturers WHERE headquarter  =  'Austin')
assistant