There is no standard price for anything. Dealer costs depend on distance from the factory, volume, special negotiated pricing, and a whole host of other factors. As far as labor, it depends on the market and the scope of work. Higher cost markets charge higher prices. A simple replacement of boxes like for like is cheaper than one where the original 1956 electrical box has to be updated to be able to have a modern kitchen and you want to take a wall down and replace a window too.

One thing I noticed from their website is the term "globally sourced". That's usually code words for Chinese manufactured. If that's actually accurate, then 21K for Chinese cabinets is obscene. Find out where they are manufactured. Not assembled. Actually produced. They use a lot of industry hot buzz words without actually telling you much about their products. I'd personally be looking for something US manufactured, KCMA certified, and with longer than a 5 year warranty.