function changePrice() {
	qty = document.customBatForm.qty.value;
	
	if (qty >= 1 && qty <= 11) {
		unitCost = 50;
	} else if (qty >= 12 && qty <= 47) {
		unitCost = 45;
	} else {
		unitCost = 38;
	}
	totalCost = unitCost * qty;
	document.getElementById('price1').innerHTML = "$" + formatAsMoney(totalCost);
	//document.customBatForm.price.value = unitCost * qty;
}

function formatAsMoney(mnt) {
    mnt -= 0;
    mnt = (Math.round(mnt*100))/100;
    return (mnt == Math.floor(mnt)) ? mnt + '.00' 
              : ( (mnt*10 == Math.floor(mnt*10)) ? 
                       mnt + '0' : mnt);
}