B. Croft has a job as a car salesman. He is paid a basic salary of £200 per month, with a commission extra of 2 per cent on the value of his car sales. During the month of April 2012 he sells £30,000 worth of cars. The first £450 per month is free of income tax, on the next £50 he pays tax at the 20 per cent rate and above that he pays at the 25 per cent rate. He also pays National Insurance for the month of £66. Calculate his net pay for the month.