Nothing is hidden. These are the exact formulas running behind the page — the same arithmetic as the original sheet, with the two long-standing errors corrected (the stage bird counts now reference the placed count, and the feed commission is applied at every stage instead of drifting with a copied cell).
- Birds at a stage
- Birds placed × (1 − mortality of the earlier stages)
- Feed cost of a stage
- Bags × rate × (1 − commission)
- Cost per bird
- Stage feed cost ÷ birds at that stage, summed over the three stages
- FCR
- Total feed intake ÷ live weight sold
- FCR (farm)
- Live weight sold ÷ number of bags fed
- EPEF
- (100 − mortality %) × live weight × 100 ÷ (duration × FCR)
- Cost per kg
- (DOC rate + feed cost per bird + total expense per kg × live weight) ÷ live weight
- Profit per kg
- Farm rate − less in market − cost per kg
- Total profit
- Profit per kg × live weight sold
- Break-even farm rate
- Cost per kg + less in market