#Solution for Mini Quiz Oct 9
#Write a program that first reads the number of customers in some 
#utilities company. Then, the program reads the monthly bill amount for each 
#customer. The program finds the following:
#    The amount paid by each customer per year.
#    The average monthly bill.
#    The number of customers who paid 50 dollars or more per month. 
#For example, if there are 5 customers, and the monthly bills are 45.99, 
#50.99, 89.99, 49.99, and 51.00, then the yearly bills are 551.88, 611.88, 
#1079.88, 599.88, 612.00. The average monthly bill is 57.59 and there are 
#3 customers who paid 50 dollars or more per month. 
size=int(input("enter number of customers "))
if(size>0):
	sum=0
	i=1
	count_50=0
	while(i<=size):
		bill=float(input("enter monthly bill "))
		sum=sum+bill
		if(bill>=50):
			count_50=count_50+1	
		print("yearly amount for customer",i,"is",format(bill*12,'.2f'))
		i=i+1
	print("average bill amount", sum/size)
	if(count_50>0):
		print(count_50, "customers paid 50 or more per month")
	else:
		print("nobody paid 50 or more")
else:
	print("invalid of input")

#Lab report
#input: size=5, bills: 1, 2, 3, 4, 5
#otput: 1*12=12, 2*12=24, 3*12=36, 4*12=48, 5*12=60
#average: (1+2+3+4+5)/5=3.0
#we got this output

#input: size=5, bills: 45, 56, 78, 89, 56
#yearly amounts: 45*12=540 56*12=672 78*12=936  89*12=1068 56*12=672 
#average bill: (45+56+78+56+89)/5 = 64.8