ABC products makes parts for car engines. three departments (A, B and C) are involved in the manufacturing process. The budgets for departmental overhead costs are $25,000, $45,000 and $30,000 respectively, which are allocated to products based on direct labor hours. Estimates of direct labor hours for each department are 5,000 7,000 and 10,000 hours respectively. The business-wide overhead absorption rate is:

a. $3.00

b. $4.55

c. $4.81

d. 5.00