function calculateVolume(itemNumber) {

	var tempQuantity = eval('window.document.frmcalculator.quantity' + itemNumber + '.value');

	var tempVolumeEach = eval('window.document.frmcalculator.itemvolume' + itemNumber + '.value');

				

	if (tempQuantity > 0) {

				window.document.frmcalculator.elements['volume' + itemNumber].value = parseFloat(tempQuantity * tempVolumeEach);

				window.document.frmcalculator.elements['volume' + itemNumber].value = Math.round(window.document.frmcalculator.elements['volume' + itemNumber].value*Math.pow(10,2))/Math.pow(10,2);

	} else {

		window.document.frmcalculator.elements['quantity' + itemNumber].value = '';

		window.document.frmcalculator.elements['volume' + itemNumber].value = '';

	}

	grandTotal();

	unitsize();

}



function grandTotal() {

	var a = window.document.frmcalculator.elements.length;

	var i=0

	var total=0

	for (i=1;i < a;i++) {

		if (window.document.frmcalculator.elements[i].name.substr(0,6) == 'volume') {

			if (!isNaN(parseFloat(window.document.frmcalculator.elements[i].value))) {

				total += parseFloat(window.document.frmcalculator.elements[i].value);

			}

		}

	}

		total = Math.round(total)

		window.document.frmcalculator.elements['TotalVolume'].value = total;

}



function unitsize() {

	var a = window.document.frmcalculator.elements.length;

	var i=0

	var total=0

	for (i=1;i < a;i++) {

		if (window.document.frmcalculator.elements[i].name.substr(0,6) == 'volume') {

			if (!isNaN(parseFloat(window.document.frmcalculator.elements[i].value))) {

				total += parseFloat(window.document.frmcalculator.elements[i].value);

			}

		}

	}

		total = Math.round(total)

			if (total <= 1) {

		window.document.frmcalculator.elements['unitsize'].value = '1.0 x 1.0';

		window.document.frmcalculator.elements['unitcost'].value = '40';

		} else if ((total > 1)&&(total <= 4)) {

		window.document.frmcalculator.elements['unitsize'].value = '1.5 x 1.5';

		window.document.frmcalculator.elements['unitcost'].value = '80';

		} else if ((total > 4)&&(total <= 6)) {

		window.document.frmcalculator.elements['unitsize'].value = '1.5 x 2.0';

		window.document.frmcalculator.elements['unitcost'].value = '100';

		} else if ((total > 6)&&(total <= 7)) {

		window.document.frmcalculator.elements['unitsize'].value = '1.5 x 2.4';

		window.document.frmcalculator.elements['unitcost'].value = '110';

		} else if ((total > 7)&&(total <= 8)) {

		window.document.frmcalculator.elements['unitsize'].value = '1.5 x 3.0';

		window.document.frmcalculator.elements['unitcost'].value = '120';

		} else if ((total > 8)&&(total <= 10)) {

		window.document.frmcalculator.elements['unitsize'].value = '2.0 x 2.0';

		window.document.frmcalculator.elements['unitcost'].value = '130';

		} else if ((total > 10)&&(total <= 14)) {

		window.document.frmcalculator.elements['unitsize'].value = '2.0 x 3.0';

		window.document.frmcalculator.elements['unitcost'].value = '160';

		} else if ((total > 14)&&(total <= 25)) {

		window.document.frmcalculator.elements['unitsize'].value = '3.0 x 3.0';

		window.document.frmcalculator.elements['unitcost'].value = '200';

		} else if ((total > 25)&&(total <= 27)) {

		window.document.frmcalculator.elements['unitsize'].value = '2.8 x 4.0';

		window.document.frmcalculator.elements['unitcost'].value = '220';

		} else if ((total > 27)&&(total <= 30)) {

		window.document.frmcalculator.elements['unitsize'].value = '3.0 x 4.0';

		window.document.frmcalculator.elements['unitcost'].value = '260';

		} else if ((total > 30)&&(total <= 40)) {

		window.document.frmcalculator.elements['unitsize'].value = '3.0 x 5.0';

		window.document.frmcalculator.elements['unitcost'].value = '290';

		} else if ((total > 40)&&(total <= 45)) {

		window.document.frmcalculator.elements['unitsize'].value = '3.0 x 6.0';

		window.document.frmcalculator.elements['unitcost'].value = '350';

		} else if (total > 45) {

		window.document.frmcalculator.elements['unitsize'].value = 'Please Contact Us';

		window.document.frmcalculator.elements['unitcost'].value = 'Please Contact Us';

		}

}