I stopped in to buy some 1/4" birch flooring underlayment to make some boxes out of. 31.00 per 4x8 sheet. It was 13.00 per sheet a little under 2 years ago. I opted out for a storage bag to put the portable wood stove for a canvas tent in and saved $10.00. 43 years ago when I was framing houses our 2x10 floor joists would sometimes need to be cut down as they often had 1/4" to 3/8' difference in width. That was aggravating!