I don't think this is as complicated as people are making it out to be. Here's one "eazy" method on how to approach it from a cost/income potentialperspective <edit... after writing this, it seems more complicated.. but honest - it's not>:
First, let's assume your cost of ingredients for the Brandy is 10 cpu (for excellent resources... just for arguement sake). 60 ingredients = 600 credits per stack. That cost is standard weather you're making drinks out of barrels or glasses.
Glass = 10 resources, 1 factory run. At3 cpu + 2500 for the factory run, that's 12 credits per "drink" based on a 1,000 unit run.
Large Glass = 100 resources, 1 factory run. At3 cpu + 2500 for the factory run, that's 102 credits per "drink" based on a 1,000 unit run.
Barrel = 363 resources, 3 factory runs. At 3 cpu + 7500 for the factory runs, that's 1,097 per "drink" based on a 1,000 unit run. However, if you are buying the barrels components from Artizans, add on another 50%, or round it off to 1,500 credits per Barrel.
Now look at your "income":
Say you are selling your Brandy for 300 credits per USE (which is based on the Fishak/Bivoli template most people are using, less a little) and your average Brandy has 7 uses:
A "single glass" run would sell for 2,100 per stack of 7. Your costs would be the brandy ingredients (which are standard for either Glasses or Barrels) plus 12 cpu. Net profit per stack is 2,100 -600 - 12 = 1,488 per stack.
A "large glass" run would sell for 2,100 per stack of 7. Your costs would be the brandy ingredients (which are standard for either Glasses or Barrels) plus 102 cpu. Net profit per stack is 2,100 -600 - 102 = 2,298 cr. More than the small glass.
A "Barrel" run would sell for 5X 2,100 or 10,500. Assume now you don't want to scare off customers, so you give a 20% discount on the Barrel size. So your "sale price" is 8,400 per use. The Proffit would be 8,400 - Brandy- Cask = 8400-600-1,500 =
6,300 per stack
So obviously, if you price per use in your stack (which most people do I think) you would make WAY more proffit with a cask at 5X usesthan a glass, even with the high resource requirements of the cask.
Summary so far:
Small Glass- 2 factory runs, 1,488 profit per stack
Large Glass - 2 factory runs, 2,298 profit per stack
Barrel - 5 factory runs, 6,300 profit per stack (giving a 20% price discount)
Now take into account that you can run 2.5 Small or Large-glass runs for each Barrel run... and remembering we have factored in the "cost of resources" into the equasion (so that resoures are "infinite"), we get the final Opportunity costs of the facotry runs as:
Small Glass-3,720 profit per "5" factory runs
Large Glass - 5,745 profit per "5" factory runs
Barrel - 6,300 profit per "5" factory runs (and remember you're giving an additional20% price discount).
Bottom line - even as the system is now, Barrels will give the best profitiability. Sure they take longer to produce, but if you are charging per-use, then you will make exponentially more money producing barrels - even if you're (1) buying all your resources and (2) buying all the ingredients for barrels at a 50% markup and (3) giving a price discount so you're not scaring customers away with a 262,500cr price per case of 25 (droping it down to 210,000).
However, from a simplicity perspective, note that you are only getting about a 10% bonus with Barrels than large glasses (or up to 45% if you don't discount), so factoring in theadded trouble, it may be not be worth it... plus you have more flexibility with the large glass runs than with the barrel runs. For my money, I'll take the large glasses just to keep it simple for myself. It Barrels went above 6X, then it would be impossible to turn down I think.
Phew - that's enough math for me. Sorry if I made anyone's head hurt.
PS - There should be a rule of thumb that you can make to find out when you should use small vs. large vs. casks based on the price per stack... I'll try to work that one out.
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