I do not know how to calculate the Accumulated Depletion.

Exercise 11-15 At the beginning of 2020, Cullumber Company, a small private company, acquired a mine for $1,940,000. Of this amount, $160,000 was allocated to the land value and the remaining portion to the minerals in the mine. Surveys conducted by geologists found that approximately 17 million units of ore appear to be in the mine. Cullumber had $195,000 of development costs for this mine before any extraction of minerals. It also determined that the fair value of its obligation to prepare the land for an alternative use when all of the minerals have been removed was $65,000. During 2020, 3.5 million units of ore were extracted and 2.90 million of these units were sold. Your answer is correct. Calculate the depletion cost per unit for 2020. (Round answer to 3 decimal places, e.g. 52.751.) Depletion cost per unit 0.12 SHOW LIST OF ACCOUNTS SHOW SOLUTION SHOW ANSWER LINK TO TEXT Your answer is partially correct. Try again. Prepare the required journal entry, if any, for the total amount of depletion for 2020. (Credit account titles are automatically indented when the amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts.) Account Titles and Explanation Debit Credit Inventory 120000 y Accumulated Depletion