First Number: 3
Second Number: 3
Sum: 6
Sum of selected items: 3
Select/un-select some items: Item A: $10, Item B: $20, Item C: $40
First Number: 3
Second Number: 2
Sum: 5
Sum of selected items: 30
Select/un-select some items: Item A: $10, Item B: $20
First Number: 3
Second Number: 2
Sum: 5
Sum of selected items: 30
Select/un-select some items: Item A: $10, Item B: $20