Dirk suffered a heart attack and was rushed to the hospital where heart surgery was performed. His total bill for medical services was $50,000. Dirk has a major medical policy with 80-20 coinsurance, a $1,000 calendar-year deductible, and a $9,000 out-of-pocket limit. The out-of-pocket limit applies to coinsurance only. Assuming this hospitalization was the first medical care that Dirk received during the year and that all of the hospital services were eligible for coverage under the policy, how much of the $50,000 bill will the insurer pay