Calculation
A five-step workflow for numerical questions
Use one process from condition marking to unit checks to reduce preventable errors.
Mark the requested value and date
Identify the required amount, tax, cost, or profit and distinguish opening, closing, and transaction dates.
Place inputs before calculating
Write where each number belongs in the formula before entering it. This exposes excluded conditions and duplication.
Check units and direction
Align won, thousand-won, or million-won units and ask whether the asset, expense, or tax should rise or fall.