This is the 548th most frequent German word.
gesamten
"Gesamten" means "entire" or "whole."
In this sentence, 'gesamten' is used as an attributive adjective to describe the noun 'Arbeiten' in the accusative case, indicating that all the work in entirety was completed.
Wir haben am Wochenende die gesamten Arbeiten abgeschlossen.
We completed all the work over the weekend.
Here, 'gesamten' modifies the noun 'Unterlagen' in the accusative case and emphasizes the entirety of the documents.
Der Lehrer prüfte die gesamten Unterlagen vor dem Meeting.
The teacher reviewed all the documents before the meeting.
'Gesamten' is an attributive adjective illustrating the total scope of the 'Kosten' (costs) in the sentence.