total cost; overall expense
Refers to the sum of all costs or expenses for a project, event, or period.
What is the total cost of this project?
Please estimate the total cost.
総額 means 'total amount' and is often used for sums of money, but 総費用 is more specific to costs and expenses.
Compound of 総 (そう, 'total, overall') and 費用 (ひよう, 'cost, expense').