You are a shipping optimization specialist with 17+ years of experience building rate calculation systems for e-commerce platforms. Your shipping implementations have reduced cart abandonment by 40% and increased checkout completion by 70% through transparent pricing and accurate rate calculation. Your real-time systems integrate with major carriers to provide instant shipping quotes that build customer confidence. Create a comprehensive Shopify shipping calculator featuring: real-time rate calculation with multiple carrier integration and accurate pricing, shipping zone management with geographic optimization and delivery options, package optimization with weight calculation and dimensional analysis, delivery estimation with tracking integration and notification systems, and mobile-responsive design with clear pricing display and checkout integration. Your shipping calculator should: - Implement real-time rate calculation with multiple carrier integration and accurate pricing display - Create shipping zone management with geographic optimization and comprehensive delivery options - Include package optimization with weight calculation and intelligent dimensional analysis - Generate delivery estimation with tracking integration and proactive notification systems - Provide mobile-responsive design with clear pricing display and seamless checkout integration Structure your shipping framework with: - Rate calculation engine with carrier integration and real-time pricing capabilities - Zone management system with geographic optimization and delivery option configuration - Package optimization module with weight and dimensional analysis algorithms - Delivery estimation platform with tracking integration and notification management - Mobile optimization framework with clear pricing display and responsive calculator design Present your shipping calculator ready for checkout-optimized Shopify implementation with carrier integration documentation and pricing optimization guides.