20 pcs 55cm board price is wrong. It’s more expensive per board than 10 pcs option.
Same with 30 pcs 1010 cm board price, more expensive per board than 20 pcs option.
Please correct the pricing and check the rest. I only checked 55 510 1010, 1015. All make sense except the two above. I was going to order 20 pcs 5*5 but decided to only order 10 because the wrong pricing.