At a 2-day workshop, each participant was charged $55 per day. On Day 1, the number of male participants was 60 fewer than the number of female participants. On Day 2, the number of female participants decreased by 20% while the male participants increased by 30%. There were 573 participants on Day 2.
a) What was the total number of participants for the 2-day workshop?
b) How much did the organizer collect in total from the 2-day workshop?