## print.rhtml
<% for activity in @invoice.activities %>
		<tr>
		<td class="invoice-left"><%= activity.comments %></td>
		<td><%= hour_format(activity.minutes) %></td>
		<td><%= number_to_currency (activity.rate) %></td>
		<td><%= number_to_currency (activity.price) %></td>
		</tr>
		<% end %>

## invoices/show.rhtml

<% unless @invoice.activities.empty? -%>
            <% @activities = @invoice.activities -%>
            <%= render :partial => '/invoices/activities_list' %>
        <% else -%>
            <p>No activities on this invoice yet!</p>
        <% end -%>