ADA Pharmaceutical Company produces three drugs$-$Diomycin, Homycin, and Addolin$-$belonging to the analgesic $($pain$-$

killer$)$ family of medication. Since its inception four years ago, ADA has used a direct labor hour$-$based system to assign

manufacturing overhead costs to products.

Eme Weissman, the president of ADA Pharmaceutical, has just read about activity$-$based costing in a trade journal. With

some curiosity and interest, she asked her financial controller, Takedo Simon, to examine differences in product costs

between the firm's current costing and activity$-$based costing systems.

ADA has the following budget information for the year:

ADA has identified the following activities and cost drivers and has assigned them a total overhead cost of $$196,000.$

Takedo selected the cost drivers with the following justifications:

SETUP HOURS: The cost driver of setup hours is used because the same product takes about the same amount of setup

time regardless of size of batch. For different products, however, the setup time varies.

NUMBER OF WORKERS: Plant management includes plant maintenance and corresponding managerial duties that make

production possible. This activity depends on the number of workers. The more workers involved, the higher the cost.

DIRECT LABOR HOURS: Supervisors spend their time supervising production. The amount of time they spend on each

product is proportional to the direct labor hours worked.

INSPECTION HOURS: Inspection involves testing a number of units in a batch. The time varies for different products but is

the same for all similar products.

NUMBER OF CUSTOMERS SERVED: The need to expedite production increases as the number of customers served by

the company increases. Thus, the number of customers served by ADA is a good measure of expediting production

orders.