This whole concept of "production cost must equal/below product value" is fishy, failed labor theory thinking, marxist bs, totally debunked and failing basic logic since 100+ years.
And you were doing so well up to here

The cost of production does need to below retail price, otherwise you're losing money. "Value" is a different variable altogether, so having price (cost) on one side and "value" on the other is comparing apples to oranges.
Nothing Marxist about any of this.
@TERA, which exchange are you watching?