Every county which maintains a county hospital or infirmary shall establish a "county hospital fund" into which fund shall be deposited all unrestricted moneys received from any source for hospital or infirmary services including money received for services to recipients of public assistance and other persons without income and resources sufficient to secure such services. The county may maintain other funds for restricted moneys. Obligations incurred by the hospital shall be paid from such funds by the county treasurer in the same manner as general county obligations are paid, except that in counties where a contract has been executed in accordance with RCW 36.62.290
, warrants may be issued by the hospital administrator for the hospital, if authorized by the county legislative authority and the county treasurer. The county treasurer shall furnish to the county legislative authority a monthly report of receipts and disbursements in the county hospital funds which report shall also show the balance of cash on hand.