0.13% = 0.0013

This is the ratio of output power to input power:

P_out / P_in = 0.0013

Hence, P_in = P_out / 0.0013

This result makes sense since it means the input power is much greater than the output power (due to the inefficiency in the supply). Once you have P_in, you can just do the same calculations as before. I was hoping that you would write these equations down and work it out for yourself. They are nothing more than the mathematical version of what I said in post #5 using words.