Swifty Corporation purchased for $$10,727,100$ a mine that is estimated to have $39,730,000$ tons of ore and no salvage value. In the first year, $6,980,000$ tons of ore are extracted.

$($a$1)$

Calculate depletion cost per unit. $($Round answer to $2$ decimal places, e$.$g$.0\mathrm{.}50.)$

Depletion cost per unit

$ per ton