Alba mining subsidiary on June 30, paid BD 2,800,000 for a an ore with a capacity 1,400,000 tonnes mineral deposites. The extracted 25,000 tonnes in first year, 45,000 tonees in second year and 70.000 tonnes in third year Compute depletion expense for the First year assuming O A. 90000 B. 25000 OC 140000 D. 50000