No, Bruce, your second answer is the correct. To reiterate, it is one part of Y and two parts of x
103 is the correct answer. I use 100 ml with 200 ml with 1000 ml for PMK. Sometimes with 4x5 I use 50 ml +100 ml + 500 ml because the tray I use for the developer is smaller.
Just maintain the 1+2+100 and you will be ok.