I want to split our joint credit card bill but have some items I pay and some my partner pays. I have 2 columns headed A and B with a sub total at the bottom for our respective personal spends. Now let's say the total bill is £300 entered in a single cell, but on that bill my personal spend is £20 and my partners personal spend is £40. So the total to split would be £240, or £120 each plus our personal spends. What would be the formula under each of our respective columns to show what we each owe? TIA.