A firm received a bill from its accountant for $3310, representing a combined total of 41 billable

Question:

A firm received a bill from its accountant for $3310, representing a combined total of 41 “billable” hours for both the Certified General Accountant (CGA) and her accounting technician, for conducting the firm’s audit. If the CGA charges her time at $120 per hour and the technician’s time at $50 per hour, how many hours did each work on the audit?