For some strange reason MATLAB spits out two answers to the following code , pay2 =, and p =. It is ony supposed to produce 1 answer

The following code is spitting out two answers, and it's only supposed to produce one answer, payment.

Instead it spits out a value for pay2 first as well as one for payment. I only want an answer for payment.

Problem 2 (fare):
                                       Testing with argument(s) 4, 44
    Feedback: Your function performed correctly for argument(s) 4, 44
                                       Testing with argument(s) 1, 20
    Feedback: Your function performed correctly for argument(s) 1, 20
                                       Testing with argument(s) 1, 11
    Feedback: Your function performed correctly for argument(s) 1, 11
                                       Testing with argument(s) 0.2, 67
    Feedback: Your function performed correctly for argument(s) 0.2, 67
                                       Testing with argument(s) 0.9, 55
    Feedback: Your function performed correctly for argument(s) 0.9, 55
                                       Testing with argument(s) 1.45, 17
    Feedback: Your function made an error for argument(s) 1.45, 17

      Your solution is _not_ correct.

    function payment = fare(miles,age)
        pay1 =0;
        pay2=0;
        pay3=0;
        if miles <= 1
            pay1 = 200;
            payment = pay1;
        elseif miles <=20
            pay1= 200;
            pay2 = (miles-1)*0.25*100
            payment = pay1+pay2;
        elseif miles>20
            pay1 = 200
            pay2 = (miles-1)*0.25*100
            pay3 = (miles-10)*0.10*100
            payment = pay1+pay2+pay3;
        end
        payment = (pay1+pay2+pay3)/100;
        if age <=18 || age>=65
            payment = (pay1+pay2+pay3)*0.8/100;
        else
            payment=(pay1+pay2+pay3)/100;
        end

    end