Kingbird Timber Company owns 9,000 acres of timberland in eastern Washington, which was purchased in 2011 at a cost of $770 per acre. In 2020, Kingbird began selectively logging this timber tract. In July of 2020, a nearby (thought to be dormant) volcano erupted, downing all of the trees and burying the timberland of Kingbird under a foot of ash. In addition, the logging roads, built at a cost of $180,000, and all of the logging equipment, with a net book value of $446,000, were destroyed. At the time of the eruption. Kingbird had logged 10% of the estimated 1,372,500 board feet of timber. Prior to the eruption, Kingbird estimated the land to have a residual value of $180 per acre after the timber was harvested, Kingbird includes the logging roads in the depletion base. Kingbird estimates it will take 5 years to salvage the downed timber at a cost of $1,000,000. The timber can be sold for pulp wood at an estimated price of $2.30 per board foot. The residual value of the land is now unestimable and must be assumed to be $0 due to future uncertainties. (a) Determine the depletion cost per board foot for the timber harvested prior to the volcano eruption. (Round per unit answer to 2 decimal places, e.g. 0.45. Depletion cost per board foot $