Match each of the following costs to the cost graph (ae) that best depicts its cost behavior as the number of units produced and sold increases. Graph 1 Graph 2 Graph 3 Graph 4 Graph 5 0 Activity Base Graph 4 Graph 3 No Answers Chosen No Answers Chosen Graph 2 Graph 1 No Answers Chosen No Answers Chosen Graph 4 Graph 3 No Answers Chosen No Answers Chosen Graph 2 Graph 1 No Answers Chosen No Answers Chosen Possible answers i.: Per-unit cost of direct materials :: Straight-line depreciation on factory equipment :: Salary of the night-time security guard of $3,800 per month : Total direct materials cost Per-unit cost of plant superintendent's salary :i: Total employer pension costs of $0.35 per direct labor hour Rent on warehouse of $12,000 per month :: Sales commissions of $6,000 plus $0.05 for each item sold :.: Per-unit straight-line depreciation costs Per-unit cost of direct labor :: Electricity costs of $5,000 per month plus $0.0004 per kilowatt-hour i: Insurance costs of $2,500 per month (:) Total direct labor cost