what does gregor's father reveal about the family financial status? what is gregor's reaction when he learns the truth about their finances?

Gregor finds out, in the story Metamorphasis, that his family doesn't eat a lot. Gregor tries to help out by throwing himself into his work so he can put food on the table. Unfortunately, his family becomes used to his contribution and begin to depend on it entirely. This upsets Gregor to some extent because he'd like to use the money to send his sister to a music school.