Begin with a real decision
The bag is where a collection becomes a choice. A product name, a quantity and a total need to stay together. If a person changes a quantity, they should not have to work out whether the summary changed too.
One edit, one clear result
Our store concept uses a line for each item, with a visible quantity control and line total. The same bag follows the visitor to checkout. In the reviewed demonstration, one pantry concept at ₹189 plus three cup concepts at ₹349 produces ₹1,236 in both views. These amounts are illustrative, not a commercial quote.
Do not make the status prettier than the truth
The demonstration has separate success, failure and pending interface states. None is called a real payment. A real checkout would need a verified payment result and an operating order record before it could tell someone a purchase was complete.
The next design question
A useful next study is the recovery journey: an unavailable item, a price change or a payment that is still being checked. The design needs to keep the bag understandable while the facts change. This page documents an interface experiment, not observed customer behaviour or a conversion result.