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% on the value of his car sales. During the month of April 20X6 he sells £30,000 worth of cars. The first £450 per month is free of income tax, on the next £50 he pays at the 20% rate and above that he pays at the 25% rate. He also pays National Insurance for the month of £66. Calculate his net pay for the month.