This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own [💀BACKROOMS💀] Slop Tower Defense! 💔 session. It will not click the shop.
Material planner
Crafting ingredient gap
Subtract the ingredients you already own from the live recipe. Type the numbers from the crafting screen. The defaults are a blank example, not a published Slop Tower Defense recipe.
Required total = materials per upgrade × number of upgrades. Missing = max(required total − materials already owned, 0).
Missing amount is needed per craft times crafts planned, minus what you own. If the result is zero or below, you have enough of that one ingredient. Check every line of the recipe. This form does not know units, currencies, or variant rules.