Fulfilling one item only, and leave the SO in Pending Approval status

We have to modify our process to have Sales Order process like this:
If the Sales Order Total is >230 (including both Non-inventory and inventory), and has a COGS Item (e.g. ItemId 101); then fulfill this Item, but leave the SO in "Pending Approval" status. 
I am not sure if I should loop through the item lines (i.e. the for loop) in my AfterSubmit script, as in 

 //     for (var i = 1; i &amp;lt;= intLineItemCount; i++)  {    var stItemId = recNew.getLineItemValue('item', 'item', i);    var intItemId = forceParseInt(stItemId);      var stTotal = recNew.getFieldValue('total');    var flTotal = forceParseFloat(stTotal);      if (intItemId == 101 &amp;&amp; flTotal &amp;gt; 230)    {        <span style="color:'Red'">// fulfill this item line only       // Should I fulfill Item 101 here or in the for loop below?</span> //        <span style="color:'Red'">// The item is not always on lineId 1.</span>        // how do I fit the intItemId in the following lines<span style="color:'Red'">       </span><span style="color:'Red'"> recNew.setLineItemValue('item', 'itemreceive', i, 'T');</span>  ???        recNew.setLineItemValue('item', 'quantity', i, recNew.getLineItemValue('item', 'quantity', i));         // do not approve                    var