Fixed price + quality price

I have important question and not find answer.

When I ordering product from market for fixed price and market price of that product is for example 1000 and I order 130 quality. Must I set price for what I want to buy to 1000 and it calculate +30% to that price automaticaly or I must set the fixed price to 1300?

And when I sell it's the same so I have quality of product 130 and market price is 1000. So I must set the sell price to 1000 or 1300?

It's very important. Problem is that I don't kno if the game add the quality price to the final price.

you set the price for Q100.
if you ask for higher quality, the price will end up higher.

Ok so when I selling Q130 I set the price to 1000 and I take 1300$ if I understand it right?