Maple blank 1" thick x 4" wide x 36" long = 1 Board Foot.
Standard shaped Fender bass neck 1" thick, 3.5" wide at the peghead, 33" long =0.8BF
Standard bass body blank. 2" thick x 14" wide x 21.5" long = 4.1 BF.
Paul Reed Smith might take a few hours one afternoon to film a nice PR video of him knocking on bits of wood but if you're FMIC in Corona there's 360 units to produce in a day, that's them at lower production levels. Factories go through 1000's of feet every week so buy direct from sawmills, with bulk purchase discount.
As to how little Maple actually costs, let me run this by you. There this decent wee sized mill in Michigan, Bell Forest. They mainly deal mail order to hobbyists and carry a very healthy list of timber.
Their top grade hard maple is $6 for 1 BF, drops 25% to $4.50 if you buy 100 BF. FMIC are going through more than 70,000 BF in a year just for necks.
2" (8/4) ash for a body is $7.50 for 1 BF, if you use Basswood it's $6.35. Discounted for 100+ BF, $5.50 and $4.80. I'll leave you to ponder the discount offered on orders for 100k BF p.a.
p.s.
The 100k BF is just a random figure. FMIC build more guitars than basses, 3.7 BF for a guitar body blank, and not all of the 80-90,000 instruments they produce yearly in Corona use ash π