We are an LLC, taxed as a partnership, and I am needing clarification on where/how to deduct the cost of services such as welding/anodizing on goods to be sold.

This post is to clarify the "we" from an earlier post I made. Again, "we" are an LLC, taxed as a partnership. We recently had some work (the welding and anodizing) done on merchandise sold. I wasn't sure how to account for it since it was a "service" done on the merchandise sold.  Thank you.