I was hoping someone would chime in here, but I think we'd have to know a little more info about the bar in question. There are such a large number of variables--what size? contents? I just don't think anyone can venture a guess. If I needed to make a WAG, I'd probably Google a Nutri-Grain bar or something similar and go with that.
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.