棚が1200円、木の板が1000円ちょい、あとバネ類が500円くらいなので、残りがほとんどネジ代ですねー。

The shelves cost ¥1200, the wood panels just over ¥1000, and the springs and such were about ¥500, so the rest of it was almost entirely to pay for the screws.