As a brand owner, you are responsible for having a clear understanding of the different costs associated with running your brand. Hula Global as a supplier can clearly define the prices for the products and services - outside of those costs quoted by Hula Global, you - as a brand owner need to do your own research and verify.
For importing clothing and apparel products - some obvious costs are freight, duties, taxes, product handling etc. These are not hidden costs but very standard costs and charges in international trade.