Eh, not really. Think about it, when the soda is free: You drink a can in the morning, because if you're a soda drinker you're probably not a coffee drinker, s

Eh, not really. Think about it, when the soda is free: You drink a can in the morning, because if you're a soda drinker you're probably not a coffee drinker, so this is your morning caffeine hit. Then you'll have one at lunch, because you're eating. Sooner or later you'll get thirsty again, so you'll have one in the afternoon. Maybe two (since the afternoon is about twice as long as the morning). So, 3-4 cans of soda per day, multiplied by 20 working days in a month gives you 70 cans per month. Assume this is near the high end of a spectrum of soda-drinking behavior, and you'll get an average of around 37 per month.