Lori Bailey, M.D., keeps her accounting records on the cash basis. During 2020, Dr. Bailey collected $580,000 from her patients. On December 31, 2019, Dr. Bailey had accounts receivable of $90,000 and unearned revenue of $15,000. On December 31, 2020, Dr. Bailey had accounts receivable of $60,000 and unearned revenue of $0. On the accrual basis, how much was Dr. Bailey's patient service revenue for 2020?

a.

$445,000

b.

$745,000

c.

$535,000

d.

$565,000