Budget shared copper-weapon materials before spending the stock
Updated
Calculating a sword and a mace separately can spend the same starting stock twice on paper. For a combined goal, reserve finished weapons first, add the remaining material demand and allocate each shared resource once. Only then expand missing ingots into ore. The result is a material plan for the stated costs, not a guarantee that every crafting condition in your game is ready.
Separate a finished target from a crafting request
The hypothetical goal is to possess a Copper Sword and a Copper Mace. That is different from crafting each again regardless of what you already own. Count usable finished weapons first and reserve any that satisfy the goal. Keep weapons or materials reserved for another project outside the stock available to this plan.
For the first case, neither weapon is owned. Usable stock is 8 Copper Ingots, 12 Planks and 250 Copper Ore. For the second case, the stock is the same but a Copper Sword is already owned. The goal remains unchanged; the work remaining changes. Do not dismantle a finished target or infer a recycling yield from this comparison.
Combine demand before using ingots
At the stated standard costs, each weapon requires 16 Copper Ingots and 8 Planks. With both still to craft, total demand is 32 ingots and 16 planks. The 8 owned ingots are used once against that combined demand, leaving 24 ingots to make. They do not reduce each weapon's separate requirement by the full starting stock.
The same rule applies to planks. Using the 12 available planks once leaves 4 to gather. A pair of independent calculations that each claim those same planks can report no shortage even though the combined plan needs more. Write the combined demand and the allocation together so that the stock has only one destination in the budget.
Expand only the missing ingots into ore
The listed ingot recipe uses 20 Copper Ore per Copper Ingot. Apply it to the 24 missing ingots, not to all 32 ingots required by the weapons. The ore demand is 480. Allocate the 250 available ore once and the remaining gathering requirement is 230 ore. Owned ingots already satisfy part of the goal and do not need to be made again.
This sequence separates an intermediate item from its raw input. If you subtract ore from every branch before combining demand, the same raw stock can also be spent twice. If you expand the ingots already owned, the plan can instead overstate gathering. Reserve the finished intermediate, expand the remaining demand and only then use raw stock.
Recalculate when a finished weapon is already owned
In the second case, reserve the existing sword and craft only the mace. Its demand is 16 ingots and 8 planks. After using the 8 ingots, only 8 more need refining, requiring 160 ore. The starting 250 ore covers that need, so additional ore is 0 and unallocated ore is 90. The 12 planks cover the weapon's demand, leaving 4 unallocated.
This result does not mean the starting sword was consumed or that the entire inventory is free for another plan. It is reserved for the final goal. Distinguish remaining materials from finished possessions, and recount actual stock after the work before starting a new budget. Reusing the original inventory in a later plan would repeat the same double-spending mistake.
Check the boundary before gathering
Compare the displayed workbench and furnace quantities with the stated costs, then confirm the relevant workstations and recipes are usable. This arithmetic does not unlock them. A material total can be correct under its assumptions while a room bonus, changed server setting or unavailable recipe makes it inapplicable to the current task.
Planks are a boundary material here. The remaining plank count does not claim how much wood or processing time you need. If you extend the plan upstream, choose the applicable recipe and combine all shared requirements before allocating that new resource. Do not invent a production ratio or silently fold an unsupported stage into the precise totals above.
Verify the resulting possessions and remaining stock
After gathering, refining and crafting through the game's supported process, check the intended finished weapons and recount usable remaining materials. If the counts differ, identify whether a starting item was reserved elsewhere, a cost assumption differed or additional work consumed stock. A discrepancy is a reason to revisit the relevant input, not evidence that adding every missing amount again is correct.
Keep the plan's scope with the result. It answers shared material allocation for these standard recipes and goals. It does not compare combat strength, predict time to gather, include every weapon or certify a server's settings. Those are separate decisions that require their own inputs.
Reserve completed targets, combine remaining material demand, use each stock once and expand only missing intermediates. Check actual costs and crafting access before applying the gathering list, then recount after crafting. This prevents both spending the same inventory twice and gathering raw material for ingots you already own.