This summer when I scored my first SP game for my friends, the umpire called one pitch "hit the plate!" and I instincitvely called out "so is it a ball or a strike?"
I only asked since I once was at a HS JV FP game (NFHS rules) where the other team was not very talented and their pitcher pitched slow pitch style. And any time she hit the plate with a pitch, the PU (working solo) called it a strike.