It’s correct. A product with various options will have each combination of options under a different SKU. It’s a singular number that identifies an exact version of a product.

Eric Michael Kelso

His parents really named him after That 70s Show?

Donna Reid Kelso

And then he went out of his way to find a girl named Donna to fulfill his nominative determinism‽

Edit: The man is 44! Unless there was a legal name change at some point, his name predates the show. Wild.