Work out the true cost of your production run, product by product. Enter the quotes you've gathered from your manufacturer(s), set how many you realistically expect to sell, and see your landed cost, margins, and projected profit before you commit.
Add each product with its own per-piece cost, quantity, and selling price. Shared costs are split fairly across all units, so each product's margin is honest.
Based on how many of each product you expect to sell. Unsold units (giveaways, samples, models) still cost you to make, so they reduce profit.
All figures are your own quotes and estimates. A planning tool, not a final budget. Part of the Entreupia Brand Production Toolkit.