Mateen Corporation operates solely in Alaska. The following data are as of 31 December 2019: Unrecovered cost Net salvage value of properties Estimated future development cost for proved reserves Proved reserves, Dec 31 Proved developed reserves Dec. 31 Production $900,000 $50,000 $200,000 150,000bbi 80,000bb 30,000bb! Compute DD&A assuming no exclusions from the amortization base. $177.500 $170,000 5175,800 $177,000 $157,000 $175,000