Can someone help me with c)? I got it wrong but I don't understand what else it could be.

Wildhorse Inc. makes two types of handbags: standard and custom. The controller has decided to use a plant-wide overhead rate based on direct labour costs. The president has heard of activity-based costing and wants to see how the results would differ if this system were used. Two activity cost pools were developed: machining (machine hours) and machine set-up (number of set-ups). The total estimated machine hours is 1,500, and the total estimated number of setups is 500. Presented below is information related to the company's operations. Standard Custom Direct labour costs $50,000 $100,000 Machine hours 500 1,000 Set-up hours 100 400 Total estimated overhead costs are $255,000. The overhead cost allocated to the machining activity cost pool is $165,000, and $90,000 is allocated to the machine set-up activity cost pool. (a) Your answer is correct. Calculate the overhead rate using the traditional (plant-wide) approach. Predetermined overhead rate 170 % of direct labour cost Attempts: 1 of 2 used (b) Your answer is correct. Calculate the overhead rate using the activity-based costing approach. Cost Pool Overhead Rate Machining $ 110 per machine hour Machine set-up $ 180 per set-up hour Attempts: 1 of 2 used (c) - Your answer is partially correct. Determine the difference in allocation between the two approaches. Traditional costing Activity-based costing Difference Standard $ 85000 $ 73000 $ 12000 Custom $ 170000 $ 182000 $ (12000) i Attempts: 1 of 2 used