Mkr

Hi, what if the company is uk based but its goods are imported from overseas. It also has its own warehouse in the uk and stores its goods. It is Vat registered and has mixed sales(marketplace and directly to customer). The customer invoice on the goods sold on marketplace shows no vat but the ones sold directly by the seller shows Vat. Do they need to include the sales made on marketplace as normal sale and pay vat or just treat it as zero rated sale assuming the marketplace has paid the Vat on sellers behalf and only include the net figure with zero vat on the return