By default in magento there is no qty field of simple product for custom option. If you want to add qty as per your custom option you can add now using this post.
Suppose you have custom option 'Color: Red, Blue, White' of your simple product and you want to add different qty option for your color option you can do it now.
1. go to app\design\adminhtml\default\default\template\catalog\product\edit\options\type\select.phtml
Find the below code:
'<th class="type-sku"><?php echo Mage::helper('catalog')->__('SKU') ?></th>'+
Now add following code just after above code.
'<th class="type-qty"><?php echo Mage::helper('catalog')->__('Qty') ?></th>'+
Now add following code just after above code.
'<td><input type="text" class="input-text" name="product[options][{{id}}][values][{{select_id}}][qty]" value="{{qty}}"></td>'+
2. go to app\code\core\Mage\Adminhtml\Block\Catalog\Product\Edit\Tab\Options\Option.php
Find the below code:
$value['sku'] = $this->htmlEscape($option->getSku());
Now add following code just after above code.
$value['qty'] = $this->htmlEscape($option->getQty());
Find the below code:
'sku' => $this->htmlEscape($_value->getSku()),
Now add following code just after above code.
'qty' => $this->htmlEscape($_value->getQty()),
3. Add field in “catalog_product_option_type_value” table
`qty` int(11) unsigned NOT NULL DEFAULT '0' COMMENT 'Qty',
原文:http://hkpatel201.blogspot.com/2014/03/how-to-add-custom-qty-to-custom-option.html
转自:Magento: How to add custom qty field to custom option of simple product magento