what is tshirt-calculator fr?

This is a small JavaScript library that figures out how much a custom t-shirt order should cost. If you run a screen printing shop or build a pricing tool for one, it handles the math of adding up the base shirt, the first print location, and any additional print locations to give you a total price per shirt. The core idea is straightforward: a shirt's price equals the blank shirt cost plus the cost of each printed design placed on it. You provide the cost of the blank shirt, the pricing for different print placements, and how many colors each placement uses. The library then crunches those numbers together so you can call a single function to get the final price. Someone building a quoting tool for a custom apparel business would find this useful. For example, if a customer wants 50 shirts with a two-color logo on the front and a three-color design on the back, this library gives you a programmatic way to calculate the per-shirt cost rather than doing it by hand or building the calculation logic from scratch. The README is quite sparse and doesn't go into detail on how to install it, what the full API looks like, or how placement pricing scales with quantity. There are tests included using a testing framework called Mocha, which suggests the calculation logic is verified to work correctly, but you'd be relying mostly on reading the source code to understand how to actually use it in a project. It appears to be a lightweight, focused utility rather than a full-featured pricing engine.