A professional audit firm charged juniors at $60 per hour, seniors at $200 per hour and the overhead rate for both was 150 per cent on direct labour. The firm added 10 per cent on total cost to arrive at a fee to be charged. If a job took 7 junior hours and 3 senior hours, what was the fee charged? Select one: a. 2805 b. 2635 c.2345 d. 3450