A professional audit firm charged juniors at $50 per hour, seniors at $200 per hour and the overhead rate for both was 200 per cent on direct labour. The firm added 5 per cent on total cost to arrive at a fee to be charged. If a job took 8 junior hours and 3 senior hours, what was the fee charged?

Select one:

a. $3150

b. $2100

c. $1050

d. $3000