Suppose a hospital writes checks of $70,000 per day and it takes, on average, nine days for those to be received and to clear the banking system. Furthermore, the hospital receives $60,000 in checks daily that take four days to be deposited and credited. What is the hospital's float? Select one: a. $870,000 b. $100,000 c. $390,000 d. $130,000 e. $630,000