C est quoi le haute de gamme?
High-end Haut de gamme (note spelling) means high-end, as in the haut de gamme horologerie industry.
And "bas de gamme" means "low-end," where "gamme" literally means "gamut" or "range."
The phrase 'pas de quoi' is a way of saying welcome in French, as a response to being thanked. In the word-by-word translation, the adverb 'pas' means 'not'. The preposition 'de' means 'from, of'. And the pronoun 'quoi' means 'what'. Literally 'not of what' it is a contraction of 'il n'y a pas de quoi'. Very idiomatic, it translates to 'nothing to it, not at all, don't mention it.' Almost always said in response to…