How much money do amusement arcades make in one day?

A group of masked men with knives know the answer to the question of how much money an amusement arcade can bring in in one day?

Three or four men, I suppose the robbees (there were four of them) were too scared to count, with white towels over their faces robbed an arcade in Fukuoka, Japan at just before 1 AM.

The crooks made off with about 3 million yen ($27Kish).

I wonder why 4 men who were being robbed couldn't make out how many people were robbing them. Sounds fishy to me?

The thieves locked the arcade employees in a storeroom before they escaped.

Police were alerted when one of the detainees climbed through a space between the walls. Sounds like this fellow had some 'experience.'

How much money have you blown at a game arcade?