This is the 12404th most frequent Russian word.
кассу
"Кассу" means "cash register" or "box office" in English.
In this sentence, 'касса' refers to the cash register or checkout location in a store where payments are made.
Я подошел к кассе, чтобы оплатить покупку.
I approached the cash register to pay for my purchase.
Here, 'касса' refers to a box office or ticket counter, specifically in a theater setting.
У нас в театре можно взять билеты за два часа до начала у кассы.
In our theater, tickets can be picked up two hours before the start at the box office.
In this usage, 'касса' is a designation for the cashier or payment office.