You know, you just might save some money buying now since oil prices are hitting new highs. It won't be long before the costs will be showing up in the prices. Buy an extra 100ft only if you can justify it, but I would say the bike lock is more important.
If you had bought HP5+ instead of Tri-X ILFORD Photo / HARMAN technology would have bought you a lock for your bike and sent it all the way to Ontario...........!!!
Simon ILFORD photo / HARMAN technology Limited
Are you serious Simon? I did buy HP5+ in 100' once on B&H. I always buy Tri-X because it is the film I started with. The first B&W roll i shot was Tri-X developed in D76. I use Pan F+ and Delta 3200 though.