Fields which you can use for the Invoice template.
<lineitems>10/10</lineitems>
The First number indicates the number of items on the first page (May be less if you have labels). The second number is for any other page.
<cartname> 
Page <pageno> of <pagemax>
<merchantlogo>
<deliveryaddress>
<invoicedate>
<todaysdate>
<paynowlink></paynowlink>
<ispaid></ispaid>
<isnotpaid>
  <invoiceterms>
</isnotpaid>
<invoiceaddress>
<invoicenumber>
<ordernumber>
<paymentstatus>
<paymenttype>
<shippingtype>
<promotionalcode>
<currencyname>
<currencysym>
<merchantaddress>
<merchantphone>
<merchantemail>
<eurovatnumber>
<startitems>
    <itemcode>
    <itemname>
    <itemquantity>
    <itemnetpriceeach>
    <itemgrosspriceeach>
    <itemtotalnetprice>
    <itemtaxrate>
    <itemtotalnettax>
    <itemtotal>
<loopitems>
<totals>    
    <zerorated>
        <totalzerorated>
        <zeroratedreason>
    </zerorated>
    <subtotal>
    <discount>
        <discountpercentage>%
        <discountamount>    
    </discount>
    <promotion>
        <promotioncode>
        <promotionamount>    
    </promotion>
    <ROC_haspromotiononsubtotal>
	<ROC_promotioncode>
	<ROC_promotiononsubtotal>
    </ROC_haspromotiononsubtotal>
    <ROC_haspromotionontotal>
	<ROC_promotioncode>
	<ROC_promotionontotal>
    </ROC_haspromotionontotal>
    <totalshipping>
    <showtax>
        <totaltax>
    </showtax>
    <ROC_hasgiftcard>
	<ROC_giftcard>
		<ROC_giftcardcode>
		<ROC_giftcardamount>
	</ROC_giftcard>
    </ROC_hasgiftcard>
    <showshippingtax>
        <totalseparateshippingtax>
    </showshippingtax>
    <total>
</totals>

<hasextrafields>
  <startextrafields>
    <extrafieldname>
    <extrafielddata>
  <loopextrafields>
</hasextrafields>

<hasinfolists>
  <startinfoitems>
    <infointro>
    <infodata>
  <loopinfoitems>
</hasinfolists>

<hasdownloads>
  <itemsattached></itemsattached>
  <startdownloaditems>
    <downloaditemname>
    <downloadurl>
    <hascredentials>
      <downloadcredentials>
    </hascredentials>
  <loopdownloaditems>
</hasdownloads>

<hastickets>
  <accessticketsurl>
  <displaytickets>
</hastickets>

<label1-billing>

Label1-4
billing,return or delivery

<merchantfirstname>
<merchantlastname>
<merchantAddress1>
<nerchantaddress2>
<merchanttown>
<merchantcounty>
<merchantpostcode>
<merchantcountry>
<merchantstate>
<merchantsupportemail>
<merchantsupportphone>
<merchantcompanyname>
<merchantwebsiteurl>
<merchanttaxreg>
<merchantinfo>