A part-time employee who rolls out dough balls at a pizza restaurant was observed over a 40-hour period for a work-sampling study. During that time, she prepared 550 pieces of pizza dough. The analyst made 50 observations and found the employee not working four times. The overall performance rating was 1.10. The allowance for the job is 15 percent. Based on these data, what is the standard time in minutes for preparing pizza dough?