Price of school desks and chairs

What is the general price of school desks and chairs (freight calculated based on a minimum of 400 sets of desks):

Single-person wooden school desk and stool: priced at 60~80 yuan/set

Double-person wooden school desk and stool: priced at 120~160 yuan/set

Single-person adjustable school desk and chair: priced at 105~140 yuan/set (due to different product types, there is a significant price difference)

Double-person adjustable school desk and chair: priced at 260~320 yuan/set (same as above)