A product mix is the combination of offered by a manufacturer. product lines loss leaders unsought goods and services high margin products

Product line

Explanation:

A product mix is the combination of PRODUCT LINES offered by a manufacturer. It can also be referred to as product assortment.

Product mix can be defined as the total number of product lines offered by a producer to it's customers.

Product line refers to a group of related products that are physically similar or are intended for a similar market.

A product line is a group of similar products that are marketed under a single brand name that is sold by the same manufacturer. Producers expand their offerings by selling multiple product lines under their various brand names, seeking to distinguish them from each other for better usability for consumers.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link :

88 because 4 plus 4 equals 8. 40 plus 40 equals 80. 80 plus 8 equals 88