Some Elders used to suggest 10% of your earnings as a good guide whenever anyone asked how much should we donate.
10% being the tithe the Israelites were required to give under the law.
I loved the scripture "Dont let your right hand know what your left hand is doing" so when I went to the meetings I put my money in my pocket on my left and I told my right hand not to worry about what my left hand was doing.
Somwhow or other most times I left the KH ,I had as much money as when I walked into the KH