Owl-Eye Radiologists (OR) does various types of diagnostic imaging. Radiologists perform tests using sophisticated equipment. OR's management wants to compute the costs of performing tests for two different types of patients: those who are hospitalized (including those in emergency rooms) and those who are not hospitalized but are referred by physicians. The data for June for the two categories of patients follow.

Hospital Patients Other Patients Total
Units produced 690 860 1,550
Equipment-hours used 250 110 360
Direct labor-hours 460 200 660
Direct labor costs $36,800 $12,000 $48,800
Overhead costs $49,320

The accountant first assigns overhead costs to two pools: overhead related to equipment-hours and overhead related to labor hours. The analysis of overhead accounts by the cost accountant follows.

Account Amount Related to:
Utilities $4,820 Equipment-hours
Supplies 12,580 Labor-hours
Indirect labor and supervision 19,100 Labor-hours
Equipment depreciation and maintenance 9,350 Equipment-hours Miscellaneous 3,470 Equipment-hours

Required:
a. Compute the predetermined overhead rates assuming that Owl-Eye Radiologists uses equipment hours to allocate equipment-related overhead costs and labor hours to allocate labor-related overhead costs.
b. Compute the total costs of production and the cost per unit for each of the two types of patients undergoing tests in June.