Passing an Ember Handlebars Helper Result to a Component

I'm having some trouble wrapping my head around Ember.js.

I'm trying to pass the value for selected to a component (course-select), but selected has to be determined first using a value derived from the "#each" block (competency.id).

I've written a helper capable of correctly determining the value and can send it back to the template:

{{current-course-helper competency.id}}  // 32

What I need to do is pass the helper result to the component (course-select) as the value for selected.

The code below shows what I would like to do, but having a {{...}} inside another {{...}} results in a build error.

<table width="600px">
  {{#each model.tier1Competencies as |competency|}}
    <tr>
        <td>{{competency.domain}}</td>
        <td>{{competency.number}}</td>
        <td>{{current-course-helper competency.id}}</td>   // Works here
        <td>
            {{course-select
                content = model.tier1Team.tier1Courses
                optionValuePath = "content.id"
                optionLabelPath = "content.name"
                selected = {{current-course-helper competency.id}} // But I need it here
                prompt = "Available Courses..."
            }}
        </td>
    </tr>
  {{/each}}
</table>

Determining the value somewhere else first seems problematic because I need competency.id from the {{#each}} block to determine the value to pass to the component.

Is there some way to pass the result of the Handlebar Helper to the component?