<div class="field alpha four columns">
  <%= select_tag "#{param_prefix}[preferred_operator]", options_for_select(Spree::Promotion::Rules::ItemTotal::OPERATORS.map{|o| [Spree.t("item_total_rule.operators.#{o}"),o]}, promotion_rule.preferred_operator), {:class => 'select2 select_item_total fullwidth'} %>
</div>
<div class="field omega four columns">
  <%= text_field_tag "#{param_prefix}[preferred_amount]", promotion_rule.preferred_amount, :class => 'fullwidth' %>
</div>

<div class="field alpha three columns">
  <%= select_tag "#{param_prefix}[preferred_operator]", options_for_select(Spree::Promotion::Rules::ItemTotal::OPERATORS.map{|o| [Spree.t("item_total_rule.operators.#{o}"),o]}, promotion_rule.preferred_operator), {:class => 'select2 select_item_total fullwidth'} %>
</div>
<div class="field three columns">
  <%= text_field_tag "#{param_prefix}[preferred_amount]", promotion_rule.preferred_amount, :class => 'fullwidth' %>
</div>
<div class="field omega two columns">
  <%= text_field_tag "#{param_prefix}[preferred_currency]", promotion_rule.preferred_currency, :class => 'fullwidth' %>
</div>

Add currency field to to item total promotion admin
Add currency field to to item total promotion admin
