Its giving me "wrong number of arguments (0 for 1)" and I am not 100% that I have the function in right place or am accessing it correctly.

Employee model
 def jobs_payable(id)
    Order.find_each(:conditions => ["order_paid = ? AND emp_paid = ? AND employee_id = ?", true, false, id]) do |order|
      jobs_payable =+ (order.hours*((order.job_rate/3).ceil))
    end
    jobs_payable
  end


Employee Index
<% @employees.each do |employee| %>
  <tr>
    <td><%=h employee.last_name %></td>
    <td><%=h employee.first_name %></td>
    <td><%= employee.jobs_payable(employee.id) %></td>
    <td><%= employee.id %></td>
    <td><%= link_to 'Show', employee %></td>
    <td><%= link_to 'Edit', edit_employee_path(employee) %></td>
    <td><%= link_to 'Destroy', employee, :confirm => 'Are you sure?', :method => :delete %></td>
  </tr>
<% end %>