So, I'm going to be opening a convenience store and sandwich bar in a couple of months and I'd a tad confused about how to calculate VAT. So, I understand you have to pay VAT on some products, but not others, and I'm wondering how at the end of a day when I cash up and find I've taken £1200, how am I supposed to know how much of that is products with VAT vs. Products without VAT
https://southafricanvatcalculator.co.za/? If all £1200 is sandwiches, then I don't need to pay any VAT, but if all £1200 is Mars bars I need to pay 20% of it, but my till is just a till.... Hopefully this is a stupid question with an obvious answer