uitkomst klopt niet (Opgelost)

<?php
function DPS($weapon,$min,$max)
{
	$weapon = strtolower($weapon);
	switch($weapon) {
	case 'axe': $attackspeed = 1.33;
	case 'daggers': $attackspeed = 1.33;
	case 'sword': $attackspeed = 1.33;
	case 'spear': $attackspeed = 1.50;
	case 'hammer': $attackspeed = 1.75;
	case 'staff': $attackspeed = 1.75;
	case 'wand': $attackspeed = 1.75;
	case 'scythe': $attackspeed = 1.75; 
	case 'shortbow': $attackspeed = 2.00;
	case 'flatbow': $attackspeed = 2.00;
	case 'longbow': $attackspeed = 2.40;
	case 'recurve bow': $attackspeed = 2.40;
	case 'hornbow': $attackspeed = 2.70;	
	}
	$averagedmg = (($min+$max)/2)/$attackspeed;
	return $averagedmg;
}
echo DPS('Sword',15,22); // hier zou 13.875 uit moeten komen, maar er komt 6.8518518518519 uit.
?>

<?php
function DPS($weapon,$min,$max)
{
	$weapon = strtolower($weapon);
	switch($weapon) {
	case 'axe': $attackspeed = 1.33;
	case 'daggers': $attackspeed = 1.33;
	case 'sword': $attackspeed = 1.33;
	case 'spear': $attackspeed = 1.50;
	case 'hammer': $attackspeed = 1.75;
	case 'staff': $attackspeed = 1.75;
	case 'wand': $attackspeed = 1.75;
	case 'scythe': $attackspeed = 1.75; 
	case 'shortbow': $attackspeed = 2.00;
	case 'flatbow': $attackspeed = 2.00;
	case 'longbow': $attackspeed = 2.40;
	case 'recurve bow': $attackspeed = 2.40;
	case 'hornbow': $attackspeed = 2.70;	
	}
	$averagedmg = (($min+$max)/2)/$attackspeed;
	return $averagedmg;
}
echo DPS('Sword',15,22); // hier zou 13.875 uit moeten komen, maar er komt 6.8518518518519 uit.
?>