[INVOICEFIRSTITEMNUM] - price of the item listed first in the invoice but the value is displayed with a decimal point and no thousands separator (for calculations)
[INVOICESECONDITEM] - price of the item listed second in the invoice
[INVOICESECONDITEMNUM] - price of the item listed second in the invoice but the value is displayed with a decimal point and no thousands separator (for calculations)
[INVOICETHIRDITEM] - price of the item listed third in the invoice
[INVOICETHIRDITEMNUM] - price of the item listed third in the invoice but the value is displayed with a decimal point and no thousands separator (for calculations)
[INVOICEUPSELL0] - base price without upsell items or other charges added later