Place it right after the product shot in your edit, once the price or item name is visible. Follow it with a cash register cha-ching for a purchase punchline, or hold it alone before cutting to the reaction shot of the buyer.
About this sound
This 1.4-second clip is Fry shouting 'calla y toma mi dinero' in Spanish in a fast, excited voice that climbs with impatience. It feels gleefully impulsive, like an instant yes to buying something irresistible. It comes from Futurama, the animated science-fiction sitcom where Fry's line became a widely quoted reaction.