Which inventor pioneered the 'razor and blades' business model, where the main product is sold at a low price to increase sales of a complementary consumable good?

Throughout history, certain inventions and discoveries didn't just change technology—they revolutionized how products are priced and marketed. Some pricing innovations had as much impact as the products themselves, establishing entirely new business models that continue to influence commerce today. Test your knowledge of these groundbreaking pricing strategies that accompanied famous inventions!

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King Camp Gillette (Gillette safety razor)
Thomas Edison (phonograph)
Alexander Graham Bell (telephone)
George Eastman (Kodak camera)