I will volunteer overseas or save some money but not both.

V $=$ I $($will$)$ volunteer overseas.

S $=$ I $($will$)$ save some money.

Question $7$ options:

V v S

$($V v S$)$ & $($V & S$)$

$($V & S$)$

$($V v S$)$ & $($V v S$)$

$$V v $$S