# 4.6 Write a program to prompt the user for hours and rate per hour using input to compute gross pay. 
# Pay should be the normal rate for hours up to 40 and time-and-a-half for the hourly rate for all hours 
# worked above 40 hours. Put the logic to do the computation of pay in a function called computepay() and 
# use the function to do the computation. The function should return a value. Use 45 hours and a rate of 
# 10.50 per hour to test the program (the pay should be 498.75). You should use input to read a string and
#  float() to convert the string to a number. Do not worry about error checking the user input unless you want to
#   - you can assume the user types numbers properly. 
# Do not name your variable sum or use the sum() function.


def computepay():
    hr=float(input("Enter the number of hours worked."))
    rph=float(input("Enter the rate per hour"))
    payA=0
    payB=0
    payT=0
    if hr<=40:
        payA=hr*rph
    elif hr>40:
        payA=40*rph
        payB=(hr-40)*rph*1.5

    else:
        print("Invalid input.")

    payT=payA+payB
    return print(payT)

computepay()