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Shelf Friend helps my friend compare supermarket prices and product care

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This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend A friend needs help while shopping at a supermarket: compare prices, understand how a kitchen or household item should be used, and weigh its advantages against the maintenance it brings home. I built Shelf Friend, a small Chinese-language web app with two connected decisions: what costs less per usable unit, and what fits the intended use? My friend stays anonymous. I have not yet collected their feedback, so the results below are my implementation checks, not a claimed user study. The calculator takes prices fro

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