What syntax adds the contribution amounts in cells O2 and P2? Select all that apply.

Correct
To add cells O2 and P2, use the function =SUM(O2,P2). You can also use the formula =O2+P2.
Correct
To add cells O2 and P2, use the function =SUM(O2,P2). You can also use the formula =O2+P2.