try: # check if they are numbers or not
    # read the hours and convert them to number
    hours = raw_input("How many hours are you working?")
    hours = float(hours)

    # read the rate and covert it to number
    rate = raw_input("Enter the rate: ")
    rate = float(rate)

    # check to see if the numbers are not negative
    if rate < 0:
        print "The rate can not be negative."
    else:
        if hours < 0:
            print "The hours can not be negative"
        else:
            if hours > 40:
                print 40 * rate + (hours - 40) * (rate * 1.5)
            else:
                print rate * hours

except:
    print "Enter numbers the next time, duude!"