Matuen corporation operates they en Alaska. The following dalawa 2019 Unrecovered cost Net value of properties Estimated future development cost for proved reserves Proved reserves. Dec 31 Proved developed reserves. Dec. 31 Production $900.000 550.000 $200,000 150,000 ooobal 30.000 Compute DDSA assuming no exclusions from the amortization base $177,500 $170,000 5175,800 $177,000 $157,000 $175,000 Matuen corporation operates they en Alaska. The following dalawa 2019 Unrecovered cost Net value of properties Estimated future development cost for proved reserves Proved reserves. Dec 31 Proved developed reserves. Dec. 31 Production $900.000 550.000 $200,000 150,000 ooobal 30.000 Compute DDSA assuming no exclusions from the amortization base $177,500 $170,000 5175,800 $177,000 $157,000 $175,000