noun
total cost; overall expense
Refers to the sum of all costs or expenses for a project, event, or period.
このプロジェクトの総費用はいくらですか。
What is the total cost of this project?
総費用を見積もってください。
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').