Fine gemset jewellery pricing calculations for e-commerce listings from Gem reporter

Do my pricing calculations for fine jewellery products to establish retail price, so metals calculations and gemstone calculations for ct weight I will supply price per ct of gemstone you find the retail price,, some items require calculating I.e. ebay fees and customs charges to be taken into account on sected items, so standard pricing for jewellery items,. Free lancer required must have experience of doing this service previously. Will need to see previous examples