A hardware store has a big sale on paint. During the sale, the demand for paintbrushes, paint rollers, and painter’s tape sharply increases. Which factor explains this rise in demand?

Paintbrushes, paint rollers, and painter’s tape are often used together with paint, so they are complementary goods. When paint becomes cheaper during the sale, more people buy paint and also want these related items. “Substitute goods” are alternatives that can replace one another, not items used together.

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