Step 1:
Calculate the Customs Duty. That's 2.5% of £85 = £2.13 but you don't pay customs Duty if it comes to less than £9 so our total of charges so far is nil.
Step 2:
Calculate the VAT . That's 20% of the cost of the jewellery and the cost of shipping added together. Assuming shipping from the USA to cost a tenner, that's 20% of £95 = £19. You WILL have to that,as VAT is charged on all relevant items costing over £15. (If there had been any Customs Duty to pay you'd also have had to pat VAT on that as well - yes, that is a tax on a tax!!!). So we're up to £19 now.
Step 3:
Add on the Customs Examination Fee. That's £8 (which you can only avoid if there's no Customs Duty or VAT to pay, such as when purchasing books).
So our estimated total of charges is now £27. You'd probably simply have to pay that to the postman before you could receive your goods but HMRC sometimes holds onto goods and send you an invoice for the charges which you must pay before the goods are sent to you.
Chris