Converting hobby to business tax question

I converted my home based hobby to an official business this past year. My question is how do I account for the tools and inventory that I already had? I make quilts, custom drapes, and other items. For example I brought my sewing machine from home to the business. Fabrics, threads, scissors etc. I know what do do with what I have acquired since, like my long arm machine, but not sure how to include what I already had.