Which inventor is credited with pioneering the 'razor and blades' business model, where the main product is sold cheaply while profits come from necessary complementary items?

Pricing strategies can transform industries and create lasting business models. One of the most influential pricing innovations of the 20th century created a business model that's still widely used today across numerous industries. Test your knowledge about this revolutionary approach that changed how companies price complementary products and created a blueprint for recurring revenue streams.

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King C. Gillette (Gillette Safety Razor Company, 1901)
Thomas Edison (Edison Records, 1888)
George Eastman (Kodak camera, 1888)
Alexander Graham Bell (Bell Telephone Company, 1877)