That $5 number is suspicious to me, or perhaps just geographically skewed. In early 90s, I went to the store and bought cigarettes for my mom almost daily and I remember it being about $2.
The $5 figure was from northern British Columbia. Cigarettes were much cheaper in the U.S. at the time (Canadians used to bring back a couple of duty-free cartons on a regular basis) and in Ontario, where the government reduced the taxes to counter smuggling.
Edit: in the link below you can see that over the course of 1990, cigarette prices rose from $35 to $48/carton (so $4.80/pack if you bought them by the carton) in 1990. They were, of course, more expensive if you bought individual packs, or if you lived in the north.
I remember visiting Canada, in the 1970s, and cigarettes were about $4 a pack. Everyone used to buy big cans of Export tobacco, and roll their own. Apparently. pre-rolled cigarettes were taxed heavily, but loose tobacco was not. I think this is still the case, in many nations. I have a friend from UK, who is always smoking hand-rolled "fags."
I paid $5/pack for Nat Shermans in SF in 1994/95. IIRC there were super cheap brands for around $2 but they were skanky, Shermans and Dunhills and American Spirits were all around $4-5.
Is a pack a day normal? During college I would feel bad that I had smoked three cigarettes a day. I've since switched to cigars, and have about one a month at most.
I don't know if it's still normal. In the 1970s and 1980s smoking a pack a day was fairly typical. Two packs a day was considered excessive, but most people knew someone who smoked that much.
$5 x 365 days x 4 years = $7300.
Given that I was saving up the money beforehand, quitting was the difference between starting school in 1990 or 1991.
I felt like a 'cold turkey' for about three months. But it was so worth it.