Is it allowable to use BOTH screw and push-in's on the same receptical?

My situation is this, I have 3x 14/2 romex running into a 12.5ci (2"x3"x2.5") box.
the Ontario electrical code allows 6 conductors and 0 or 1 marret in that size of box.

If I can use both screw terminals and 1 push in I would need no marrets, but if I can't I will have to try and find a 2x3x3 box.


I personally use marrets and pigtails normally when connecting outlets, but because this box is a little small it has raised this issue