openproject/app/assets/templates/work_packages/summarized_cost_entries.html

<span class="costs costTypes" ng-if="costTypes">
  <span ng-repeat="costType in costTypes">
    <a  ng-href="{{ linkToSummary(costType) }}" title="{{ costType.props.name }}">
      {{ costType.props.units }}
      <span class="unit" ng-switch="costType.props.units">
        <span ng-switch-when="1">{{ costType.props.unit }}</span>
        <span ng-switch-default>{{ costType.props.unitPlural }}</span>
      </span>
    </a>
    <span class="separator" ng-if="!$last">,</span>
  </span>
</span>