11.38 Tan Corp. purchases land containing a coal mine for $30,000 and pays $5,000 and $6,000 in exploration and development costs, respectively. Prepare the necessary entry. 11.39 Assume that geologists estimate that the mine in Problem 11.38 has a 13,000-ton capacity, and that the land will have a salvage value of $2,000. (a) Find the depletion rate. (b) Prepare an entry for the depletion of 19X1 if 1,000 tons of coal are mined and sold