john, stan, and kate, CDR, is a law firm that specialized in corporate litigation. The firm leases a legal research database from a Legal Software Company. The lease agreement calls for a base charge of $5,000 per year plus $100 per year. In addition to that , the firm is charged $2 for each hour the data basis is used. The firm rents their office space at a cost of $80,000 per year. What is the firm's total annual cost for the database if a total 2,500 research hours are used? Find the firm's cost per research hour at a level of 2,500 hours? find the firm's cost per research hour if 2,000 hours are used