I sell a cheese and cider box for £34 that is a mix of alcohol and zero tax rated cheese. The price of the cider component is 11.97 and the price of the remaining goods is 22.03. how can I create a tax code that only charges 1.99 tax on this item? Is there a formula for calculating this? I thinkI have to work out the % of tax on the whole product price, but where do I record this on shopify? could somone point me to a help page on this? Thanks in advance!