Ben Cartwright & Co. keeps his accounting records on the cash basis. During 2022, Ben collected $525,000 from his patients. At December 31, 2021, Ben had accounts receivable of $60.000. At December 31, 2022, Ben had accounts receivable of $90,000 and unearned revenue of $25,000. On the accrual basis, how much was Ben Cartwright's patient service revenue for 2022? a. $530.000 b. $580.000 c. $585 000 d. $520.000