6. It is estimated that Job A for the Freiburger Co. will require $3,000 of direct materials, 100 direct labor hours and 150 machine hours. Freiburger allocates overhead at $8 per machine hour. In order to be competitive, the total cost of Job A must be $6,000 or less. The wage rate must be less than or equal to a. $12.00 per direct labor hour. b. $ 8.00 per direct labor hour. c. $15.00 per direct labor hour. d. $18.00 per direct labor hour