Use "incidental expense" in a sentence

1. He put his watch into his waistcoat pocket, and his purse—with all that was left of the hundred and eighty roubles he had taken for his journey, and for the incidental expenses of his fortnight’s stay with his cousin—and then he placed into his trouser pocket his cigarette-case and electric cigarette-lighter, and two clean handkerchiefs into his coat pockets, and went out of the room, leaving as usual the mess and confusion which he had made to be cleared up by Stephen, an old man of over fifty