【中文说明】用于计算餐饮菜单的单份成本、食材成本率、贡献毛利和建议售价，并结合销量进行菜单分类。提供供应商价格、采购单位、可用率、配方份量、税率和销售数据，要求输出计算依据及调价、分量或菜单优化建议。 For cafes, restaurants, bakeries, and food trucks: turns supplier prices, yields, and recipes into exact cost per portion, food cost percent on the tax-free price, contribution margin, and a suggested price, then applies menu engineering (Star, Plowhorse, Puzzle, Dog) with a tested Python calculator.
