Help for Script modification, it creates selection copies , looking for limit width

I've made two changes, both bound by empty comments (//). 

var limit = 110;  // horizontal, cm

// A Script for Adobe Illustrator to Duplicate Items Hor/Ver with Margin
// Originally by https://github.com/hilukasz
// This https://gist.github.com/ExtremeGTX/2ca86e77c78153a3b43b6eb5088a426f
// Modified by Mohamed ElShahawi (ExtremeGTX)

app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;
var doc = app.activeDocument;
var thislayer = app.activeDocument.activelayer;
var selected = doc.selection;
var selectedHeight = selected[0].height;
var selectedWidth = selected[0].width;
var OriginX = selected[0].position[0];
var OriginY = selected[0].position[1];
var repeatAmount,
    myInput,
    splitInput,
    margin,
    selectedPosition,
    Direction;

// Run
userPrompt();
Direction == 'v' ? DuplicateVertical() :  DuplicateHorizontal();

function DuplicateHorizontal() {
    selectedPosition = selected.position;
    var newItem = selected[0].duplicate(thislayer, ElementPlacement.INSIDE);
    //
    var startPosition = newItem.position[0];
    //
    for(i = 0; i < repeatAmount - 1 ; i++){ 
        var newPosX = selectedWidth + newItem.position[0] + margin;
        //
        if (newPosX - startPosition < limit * 28.346456693 - selectedWidth) {
            newItem.position = [newPosX, newItem.position[1]];
        } else {
            newItem.position = [
                startPosition, 
                newItem.position[1] - selectedWidth - margin
            ];
        }
        //
        doc.selection = null;
        newItem.selected = true;
        var selectedPosition = selected.position;
        newItem.duplicate(thislayer, ElementPlacement.INSIDE);  
    }
    newItem.remove();
    app.redraw(); 
}

// function DuplicateVertical(){
// 	  selectedPosition = selected.position;
// 	  var newItem = selected[0].duplicate( thislayer, ElementPlacement.INSIDE );  
// 	  for(i=0; i< repeatAmount -1 ; i++){ 
// 		    var newPosY = selectedHeight - newItem.position[1] + margin;
// 		    newItem.position = [newItem.position[0],-newPosY];
// 		    doc.selection = null;
// 		    newItem.selected = true;
// 		    var selectedPosition = selected.position;
// 		    newItem.duplicate( thislayer, ElementPlacement.INSIDE );  
// 	  }
// 	  newItem.remove();
// 	  app.redraw();
// }

function userPrompt(){
    myInput = prompt('Ποσότητα, Διάστημα','10 0.2');
    splitInput = myInput.split(" ");
    repeatAmount = Number(splitInput[0]);
    margin = Number(splitInput[1]*28.346456693);
}