Margin & break-even
Profit calculator
Calculate Fell & Sell batch revenue, sell-through, gross profit, margin, unsold inventory cost, and break-even units with your own observed values.
Reviewed 2026-09-19 · Ver. 1.4.3 named baseline · September 18 public update
Transparent output
Profitable under these assumptions
- Revenue
- ¤400
- Cost of sold items
- ¤160
- Unsold inventory
- 2 items · ¤40
- Break-even
- 2 sold units
Formula shown: revenue − sold-item cost − fixed costs. Unsold inventory is listed separately and does not disappear.
Calculate a batch from observed costs and prices
Enter your acquisition cost per item, a tested sale price, the batch size, expected sell-through and fixed session costs. The calculator reports revenue and profit for units expected to sell. It lists unsold stock separately so that inventory value is not silently treated as earned cash or a completed sale.
When to use it
- Compare two tested selling prices against their expected sell-through.
- Check how many sales cover fixed costs at a positive unit contribution.
- Keep the cost tied up in unsold stock visible before buying another batch.
Current-build context
The September 4 Shop Update reworked base pricing and shop bonuses. Ver. 1.4.3 improved pricing clarity and fixed furniture price stacking. Re-enter current observed values instead of carrying a launch-era price table forward. The public September 18 update changed loot and furniture balance; returning to the shop applies the announced furniture adjustments.
Named patch baseline: Ver. 1.4.3. Newer public bulletin: Dungeon Update, September 18, 2026. Official-source review: September 19, 2026. Check the dated update history.
Worked example — hypothetical numbers
Hypothetical example: 10 items cost 20 gold each, sell at 50 gold, and achieve 80% sell-through with 40 gold in fixed costs. Eight units sell for 400 gold. Sold-item costs are 160 gold, leaving 200 gold profit after fixed costs. Two unsold items retain a 40-gold acquisition cost. Two sales cover the 40-gold fixed cost at 30 gold contribution per item.
How to interpret the result
Expected sell-through is rounded to a whole number of sold units. This is a batch accounting scenario, not a model of customer willingness to pay. Fixed costs should cover only the period or batch being compared. Break-even sales may exceed the available batch, so check that count against stock on hand.
Frequently asked questions
Does it suggest the maximum sale price?
No. Use observed prices from the price test log. Price acceptance and selling speed are inputs to the scenario, not outputs of a hidden formula.
Is unsold inventory counted as a loss?
It is shown separately at the cost you entered. Profit deducts the cost of sold units and fixed costs; it does not assume that remaining inventory has vanished.
Why can break-even be unreachable?
If the sale price does not exceed unit cost, each sale has no positive contribution available to recover fixed costs. Higher volume alone does not fix that scenario.
Related guides and next steps
Evidence and model limits
Official announcements support the game changes described here. Input values, forecasts and decision scores are supplied by you or explicitly identified as editorial examples. Hidden price coefficients, drop rates and salvage percentages are not assumed.