A week’s supply?
One hit is $5. Purer heroin is around $20. Depending on the addict, I have heard of addicts living on $20-$40 of heroin a day. The heroin zombies break into cars and steal change just to score a hit. One zombie bought a couple of cases soda with an EBT card and broke the can return machine with full cans. Heroin is cheap and illegal.