It is very simple:
http://www.glitchremote.com/#Calculator://0/0/0
* search (top screen) for recipes, items, anything... including "tower" for tower levels
* click an item, or many items
* at the left you will see the recipe with all the ingredients
* at the right you will see totals for each ingredient/resource you need
* there are two buttons at the top, you can see all ingredients... or you can see what you need according to your actual inventory. (you need to log in for that option)
for example:
Tower Floor 1:
http://www.GlitchRemote.com/#Calculator:Tower%252BFloor%252B1/1/0/0/1
20 Awesome Stew:
http://www.GlitchRemote.com/#Calculator:Awesome%252BStew/20/0/0/1
note: at the bottom there is a box with a link... you can share that link or use it as a bookmark, to "set the recipes list again" (because it is saved in your browser, so if you go to the calculator again... you can continue)
note2: for each ingredient you need... there is a button "find SDBs" so you can just buy everything from your friends
- UXRoot
ETA: if you buy things or get more resources in the game... you will need to click the "refresh inventory and recalculate" so GR reprocess your inventory
ETA2: just added an approximate cost of what you need when using the GlitchRemote calculator... is just to have an idea of how much it would cost