Well its my bf...i dont understand him..?

We have been dating for sum time maybe 6months and a half and now we live together and he goes to work.. But he doesn't want me to know his business of how he spends his money.. I don't think that's fair.. What does he do with the 50 dollars remaining out of a 100 he spend 50 on me and I don't know what he did wit the rest.. He doesn't smoke or drink or hang out and is home on time.. But wen I ask him he claims everything was spend between me and him and I didn't really check it correctly but I don't remember that.. Now he's mad at me and doesn't want to speak for me asking a simple question to him.. And I also want to ask . He doesn't have a cellphone and wen he's working he claims he doesn't want to get introuble or put a bad impression on his boss for using the store phone to call me .. How should I feel ? maybe he feels he doesn't have to call since he comes home to me ?