Linking Cost of goods to specific projects

Is there a way to link a vendor payable to a specific client invoice. For example I purchase a transformer from a vendor for $100.00 and it is used on a specific job for ABC Lighting. I do not want to bill ABC Lighting for the $100.00 cost I just want to know that the $100.00 cost is for product used on that specific job. Just trying to evaluate cost of goods per project. There will be other vendor invoices against the same ABC Lighting and perhaps even multiple project for ABC lighting, keeping each job separate. Any suggestions.