In this Division, the
"cooling off period" for the purchase of a motor vehicle is the period
commencing when the purchaser enters into the contract for the purchase of the
motor vehicle from the motor dealer and ending--
(a) at 5pm on the next day that the motor dealer carries on business with the public, or
(b) if the motor dealer closes for business before 5pm on that day, at the close of business on the next day that the dealer is open for business following that day.