Thomas Martin receives an hourly wage rate of exist40, with time and a half for all hours worked in excess of 40 hours during a week. Payroll data for the current week are as follows: hours worked, 48: federal income tax withheld, exist350: social security tax rate, 6.0%: and Medicare tax rate, 1.5%. What is the gross pay for Martin? a. exist1, 581 b. exist449 c. exist1, 730 d. exist2, 080