Zoho CRM Inventory Integration

I need my existing Zoho CRM instance extended so it can track physical product inventory end-to-end. The immediate focus is on the Sales Orders module: creating it, customising the layout, and making sure stock levels update accurately whenever a sales order is confirmed... (Budget: ₹1500 - ₹12500 INR, Jobs: CRM, Inventory Management, PHP, Product Management, Salesforce.com, Software Architecture, Workflow Automation, Zoho CRM)