public class QuoteCalculator { // Small helper class to represent a product on the quote public class QuoteProduct { public String name; public Decimal monthlyPrice; public QuoteProduct(String name, Decimal monthlyPrice) { this.name = name; this.monthlyPrice = monthlyPrice; } } // Custom exception for quote rule errors public class QuoteRuleException extends Exception {} // Method to build a quote product list (simulate “add products to quote”) public static List<QuoteProduct> addProductsToQuote( Decimal realTimePrice, Decimal historicalPrice, Decimal newsAnalyticsPrice, Boolean includeRealTime, Boolean includeHistorical, Boolean includeNewsAnalytics ) { List<QuoteProduct> products = new List<QuoteProduct>(); if (includeRealTime) { products.add(new QuoteProduct('Real-Time Market Data Feed', realTimePrice)); } if (includeHistorical) { products.add(new QuoteProduct('Historical Data Feed', historicalPrice)); } if (includeNewsAnalytics) { products.add(new QuoteProduct('News Analytics Feed', newsAnalyticsPrice)); } return products; } // Main method: enforces rules, discount and calculates final price public static Decimal calculateFinalQuotePrice( List<QuoteProduct> products, Integer termInMonths ) { if (products == null || products.isEmpty()) { return 0; } if (termInMonths == null || termInMonths <= 0) { termInMonths = 1; // default } // Flags for rule checking Boolean hasRealTime = false; Boolean hasNewsAnalytics = false; // Sum monthly prices Decimal monthlyTotal = 0; for (QuoteProduct p : products) { monthlyTotal += p.monthlyPrice; if (p.name == 'Real-Time Market Data Feed') { hasRealTime = true; } if (p.name == 'News Analytics Feed') { hasNewsAnalytics = true; } } // Product rule: // News Analytics Feed requires Real-Time Market Data Feed if (hasNewsAnalytics && !hasRealTime) { // Throw exception if rule is not met throw new QuoteRuleException( 'News Analytics Feed requires Real-Time Market Data Feed.' ); } // Discount rule: // If there are 3 products on the quote apply a 10% discount Decimal discountPercent = 0; if (products.size() == 3) { discountPercent = 0.10; // 10% } Decimal discountedMonthlyTotal = monthlyTotal * (1 - discountPercent); // Final quote price for the given term Decimal finalPrice = discountedMonthlyTotal * termInMonths; return finalPrice.setScale(2); } }

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