Subtotals by category
I have a list of expenses categorized according to who made them - e.g. Bob's expenses, Alice's expenses, etc. The categories are just plain text I entered into a column
At the bottom, I want there to be a subtotal for each person. E.g. Paid by Bob (Total), Paid by Alice (Total). If I also add an additional person, eg. John, then this person's subtotal would appear at the bottom as well.
Is this possible?