How Much To Give To Church?

Okay, I give to church but the topic of money tends to be a weekly occurrence. My wife and I are not giving as much because she isn't working right now and we have a new born. I just got a pay cut of 3% and make around 40K a year. I don't have cable, I don't have internet on my phone, we have cars that are older than 10 years old. We give about $165 a month to church and am trying to decide how much to give to the service appeal. My parents live on social security and could use some extra money. I feel bad giving all my charity money to church when I should be giving some to my parents. Well anyways, I just feel like I'm suppose to give to the church no matter if I have the money or not. Based on Jesus' teachings, what should I do?