In a particula local-government office, the average cost of dealing face to face with an enquiry from a membe?

in a particular local-government office,the average cost of dialing face to face with an enquiry from a member of the public is estimated to be �28.50. The office receives 175 enquiries per week.A new online service is expected to cut the number of face to face enquiries by 25%.What annual saving can be expected in the cost of dialing with enquiries face to face