Final answer:
The order filling cost assigned to the large customer at Daffodil Cosmetics using activity-based costing method is $10,000, as the customer places four orders and the cost per order is $2,500.
Step-by-step explanation:
To calculate the order filling cost assigned to the large customer using the activity-based costing (ABC) method, we first need to determine the cost per order. Given that the annual order filling cost is $510,000 for all customers and there are 204 orders in total (4 from the large customer and 200 from the other customers), we divide the total cost by the total number of orders to get the cost per order.
Cost per order = $510,000 / 204 = $2,500 per order.
Since the large customer places four orders a year, the cost assigned to this customer is:
Large customer order filling cost = 4 orders x $2,500 per order = $10,000.
Therefore, the correct answer is (a) $10,000.