Answer:
out-of-pocket
Step-by-step explanation:
In Accounting, costing is the measurement of the cost of production of goods and services by assessing the fixed costs and variable costs associated with each step of production.
Cost pool is simply the amount of money spent by a firm on a particular activity.
Generally, an activity-based costing uses numerous cost pools such as manufacturing cost or customer services and numerous cost drivers such as direct labor hours worked, number of changes used in engineering department, etc.
Generally, an out-of-pocket cost requires that an individual or business outlay their future cash-flow and it must be relevant for current and future decision making.