tmp.py

#!/usr/bin/env python

TICKETPRICE = 2.50
EVENINCREASE = 0.2
def calc_math(afternoon_attendence):
    ticket_revenue = afternoon_attendence * TICKETPRICE
    evening_attendence = (afternoon_attendence * EVENINCREASE) + afternoon_attendence
    if (evening_attendence > 350):
        evening_attendence = 350
    else:
        if evening_attendence % 3 > 0:
            import math
            evening_attendence = math.ceil(evening_attendence)
         #calc evening revenue
         evening_revenue = TICKETPRICE * evening_attendence
         return ticket_revenue, evening_attendence, evening_revenue

def main():
    afternoon_attendence = int(input("How many people attended in the afternoon? "))
    if 350 < afternoon_attendence > 0:
        print(f"Number must be between 0 - 350. You gave `{afternoon_attendence}`")
    else:
        w, x, y = calc_math(afternoon_attendence)
        print(f"${w:,.2f} {x:.0f} ${y:,.2f}")

main()