Sophie earns a salary of $650 per month for working 6 hours a day. In May, Sophie worked additional hours at $8 per hour and earned $698 for the month. Write an equation to model this situation. Which of the following options correctly represents the equation?

A) $650 + ($8 * additional hours) = $698
B) $650 * 6 + ($8 * additional hours) = $698
C) $650 + ($8 * 6) = $698
D) $650 * additional hours + ($8 * 6) = $698