Complex sentence: Allie and Charlie go to a hardware store to buy components for a new invention of Allie's, an ice machine known as Fat Boy, but, upon seeing that the product was made in Japan, Allie refuses to purchase it.
Split into simpler sentences: Allie and Charlie go to a hardware store to buy components for a new invention, an ice machine known as Fat Boy. Upon seeing that the product was made in Japan, Allie refuses to purchase it.