This is the 472nd most frequent German word.
kostet
"Kosten" means "costs" or "is priced at" in English.
Here, 'kostet' is used metaphorically to express non-monetary expenditure, in this case of time.
Das Projekt kostet uns viel Zeit.
The project costs us a lot of time.
Here, 'kostet' is used to express the price or cost of an item.
Das Buch kostet zehn Euro.
The book costs ten euros.
In this sentence, 'kostet' is part of a question asking for the price of an item.