He earns [makes] about 100,000 yen a month by working part‐time.
He earned as much as 100,000 yen working part-time last month.
Every month he saved ten thousand yen out of his income in the name of his daughter.
Every month, he saved ten thousand yen out of his income for his daughter.
His weekly wages are $20.
He earns not more than 200,000 yen a month.
He realizes 100,000 yen from his business.
He turns over 10,000 yen a month.