Intra$-$Spect Mining Co$.$ acquired mineral rights for $$40,500,000.$ The mineral deposit is estimated at $30,000,000$ tons. During the current year, $7,200,000$ tons were mined and sold.

a$.$ Determine the depletion rate. If required, round your answer to two decimal places.

per ton

b$.$ Determine the amount of depletion expense for the current year.

$

c$.$ Journalize the adjusting entry on December $31$ to recognize the depletion expense. If an amount box does not require an entry, leave it blank.

Dec. $31$