Earlier quoted context omitted.
They actually sell the same hot dogs that they use in the food court back in the refrigerated area (or something very similar) but I'm not at a Costco and can't check the pricing. I doubt they're making much of a profit on the dog-and-a-drink combo, but I'm pretty sure they're not subsidizing it at least in terms of ingredients. I'd be surprised if cost of ingredients for it was more than $1-1.10 - $0.50-0.60 for the…
I seriously doubt that their cost of soda runs even $0.30. A 5 gallon bag of Coke syrup (in relatively small quantities) runs $75 and makes 30 gallons or ~500 small cups of soda. At another 10c, the ice and an expensive cup might cost as much as the soda itself, but $0.20 total is probably high for Costco. https://www.quora.com/Are-the-drinks-and-beverages-normally-...
Sams runs a 32oz drink with theirs. You could claim that it is only a 16oz with the ice but on the other hand you have free refills so I think 32oz is a fair average between ice and refills.
At that point it is 120 drinks per 5 gallons of syrup. Using your figure of $75 that leaves each drink costing $0.62 plus the cup. (Ice is negligible in cost.)
Non branded cups are $0.075 ea. I doubt branding adds much cost at scale.
Hot dogs are $96 for 120 (40 lb case) That comes out to be $0.80 per.
As for buns it looks like ~$0.15 per bun.
So add up soda + cup + hot dog + bun and you get $1.64 per meal. I left out lids, straws and napkins but those are small amounts.