Break-even
Updated
The two kinds of cost
Fixed, per year: process filings, operator training amortized, insurance, licenses, equipment depreciation, any standing kitchen commitment, market stall fees booked for the season.
Variable, per bottle: ingredients at measured yield, packaging, the per-batch costs divided by bottles per batch.
Your own labor belongs in one of these depending on whether you pay yourself a wage or take what is left. Put it somewhere. Leaving it out is a common way a break-even comes out flatteringly wrong.
The calculation
What it tells you
Whether the price is viable at the volume you can actually produce and sell. If break-even needs more bottles than your kitchen shifts allow, the price is wrong, not the plan.
It also tells you what a second product costs. Each one adds fixed cost, a filing, a label and an inventory line, and it must clear its own break-even rather than borrowing the first product's.
Recalculate when anything structural changes: a new channel, a price change, a copacker, a second sauce. A break-even from last season is a description of last season.