Loose produce item is sold as an each (individual piece) or weight.
Where a loose produce item is sold as an each or weight (product 3), is then packaged in-store and sold as a fixed measure (product 4), product 3 and 4 require separate unique GTINs.
An apple sold by each or weight for 1.29 per kilo/pound. It is then packed in-store as a fixed measure container and sold at 3.00 for a 6-pack of apples.