What is the missing reagent in the reaction below? 
Definitions:
Time-Based Activity-Based Costing
An accounting method that tracks costs of activities based on the time spent on them, allowing for more accurate product costing.
Matching Capacity
The process of ensuring that a company's production capacity meets or matches the demand for its products or services, aiming for operational efficiency and customer satisfaction.
Product's Profit
The financial gain made from selling a product after deducting the cost of its production and sale.
Activity-Based Costing
A costing method that assigns overhead and indirect costs to related products and services based on the activities they require.
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