Person A:
income £887.20
bills £416.01
leftover £471.19
Person B:
income £2818.78
bills £1793.26
leftover £1025.52
The above is the situation in my household, married with 2 children. No official joint finances, e.g. 1 on the mortgage, separate bank accounts etc.
Person A does top up food shops throughout the week from their leftover amount, Person B does the weekly big shop which is included as part of their bills (approx. £550pm total).
How should the leftover spend be split when Person A pays towards food from their leftover amount? And how much would be reasonable to save from what's leftover each month?