I have a receipt with two purchases, one of which I want to submit as a business expense. Now I wanted to calculate the vAT on that one amount, but then the total amount doesn’t match. The total amount is £19.49. Minus £2.50 (private purchases) = £13.99. The receipt states 21% vAT from 16.11. How should I calculate this…? ChatGPT gives me a good explanation…. 🙂