Add Regular Price to the invoice

Thanks Ewout, line_total and single_line_total work fine. Is there any way to show:
– line_total and single_line_total but with TAX
– Total tax amount for whole order

Hi, so sorry to ask silly questions. but where can I find variable list like line_total, single_line_total,.. Are those variable defined by woocoomerce or by plug-in? These variable seems to be pre-formated. I tried some calculation on these and it return 0

Hi!
Yes, these variables are preformatted with the currency. If you want full control over which prices to display, I recommend the Premium templates extension, which lets you add, delete and reorder columns and totals and give the precise definition for each price (unit/total price, before/after discount, including/excluding tax, etc etc). Check this screenshot from the customizer.

Hope that helps!

Ewout