you can try with some of these

Code: [Select]

<meta itemprop="price" content="<?php echo osc_item_price() / 1000000 ?>.00" />

or

Code: [Select]

<meta itemprop="price" content="<?php echo osc_item_price() / 1000000 ?>" />

on chrome view-source:  you have to get some like this

Code: [Select]

<span itemprop="offers" itemtype="http://schema.org/Offer" itemscope>   
        <meta itemprop="priceCurrency" content="USD" />
        <meta itemprop="price" content="15000.00" />
    </span>


Many thanks for this solution, work perfectly ! Now only a few "optional yellow warnings" appear but not mandatory to correct for schema.org.

I will try to improve these. Will update.

@Federico Bergna
+1