Low Variables in cartthrob arithmetic

Question

Hi is there any posibility to get this working?

{exp:cartthrob:arithmetic expression="{option_price_numeric} -({option_price_numeric} * {exp:low_variables:single var='early_bird_discount'} / 100)"}

In {exp:low_variables:single var='early_bird_discount'} is 30 in this example I'm getting an "undefined variable" error and I know this is correct but I don't know how exactly get the right result for this

Update:

Using the first option Rob Sanchez suggests gives me the following error: Unparsed EE tags in expression, check parse order. Perhaps it is important for you that the tag is nested into several tags in an embed template:

{exp:channel:entries channel="events" require_entry="yes" entry_id="{embed:entry_id}"}
  {exp:cartthrob:item_options entry_id="{entry_id}"}
    {categories show_group="24"}
      {options}
        {if option_value == "{embed:option}"}

          {if category_id =="160"}
            {if "{event_early_bird_date format='%U'}" >= "{current_time format='%U'}" && "{exp:low_variables:single var='siteA:early_bird_discount'}" >"{embed:another_discount}"}
{!-- ##### --}
              {exp:cartthrob:arithmetic expression="{option_price_numeric} -({option_price_numeric} * {early_bird_discount} / 100)"}
{!-- ##### --}
            {if:else}
              {exp:cartthrob:arithmetic expression="{option_price_numeric} -({option_price_numeric} * {embed:another_discount} / 100) + {embed:membrr_price}"}
            {/if}
          {if:elseif category_id =="161"}
            [....]
          {/if}
          [...]

        {/if}
      {/options}
    {/categories}
  {/exp:cartthrob:item_options}
{/exp:channel:entries}

Update 2

I figured out the problem I think. early_bird_discount is a low variable of siteA but I'm trying use this variable on siteB so using {early_bird_discount} does not work here. Is there any possibility to get the global variable from siteA on siteB?

Answer 1

You could try two things:

One is to set this particular Low Variable as Early Parsed (in the variable settings). Then you can call it like this:

{exp:cartthrob:arithmetic expression="{option_price_numeric} -({option_price_numeric} * {early_bird_discount} / 100)"}

Or you could try adding parse="inward" to the arithmetic tag:

{exp:cartthrob:arithmetic parse="inward" expression="{option_price_numeric} -({option_price_numeric} * {exp:low_variables:single var='early_bird_discount'} / 100)"}